diff --git a/SKILL.md b/SKILL.md
index ec1a679..65cc783 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -340,14 +340,10 @@ Leave any genuinely-unknown field blank — the SOP hides blank parameters, so a
 empty until filled. The full method for the second-source search is in
 `references/schlib_parameters.md`.
 
-Write the **full parameter set** — the typeid template's engineering columns **plus** the SOP
-params above (see `references/schlib_parameters.md`). Collect your filled values into a
-`params.json` and pass `--typeid` so the writer guarantees every template column is present
-(blank where the datasheet is silent):
+Collect the values into a `params.json` and write them into the symbol:
 
 ```bash
-python scripts/schlib_write.py --schlib <in>.SchLib --params params.json \
-    --out <stage>/<tag>/<sym>.SchLib --typeid <TYPEID>
+python scripts/schlib_write.py --schlib <in>.SchLib --params params.json --out <stage>/<tag>/<sym>.SchLib
 ```
 
 Deliver the resulting `.SchLib`; the engineer opens it in Altium once to confirm it loads, then
diff --git a/assets/CHANGELOG.xlsx b/assets/CHANGELOG.xlsx
index 2f57f66..1cc428e 100644
Binary files a/assets/CHANGELOG.xlsx and b/assets/CHANGELOG.xlsx differ
diff --git a/assets/template/template.xlsx b/assets/template/template.xlsx
index 8292a39..ab04474 100644
Binary files a/assets/template/template.xlsx and b/assets/template/template.xlsx differ
diff --git a/assets/template/versions.json b/assets/template/versions.json
index b29a5f1..fb110ec 100644
--- a/assets/template/versions.json
+++ b/assets/template/versions.json
@@ -88,8 +88,8 @@
     "template_version": 1
   },
   "CMC": {
-    "skill_version": 1,
-    "template_version": 1
+    "skill_version": 2,
+    "template_version": 2
   },
   "CMP": {
     "skill_version": 1,
diff --git a/references/schlib_parameters.md b/references/schlib_parameters.md
index b84b496..9b53436 100644
--- a/references/schlib_parameters.md
+++ b/references/schlib_parameters.md
@@ -93,35 +93,24 @@ symbol's Library Ref (from `altium_refs.py`); omit it to apply to every componen
 }
 ```
 
-## The full parameter set (template + SOP)
-
-Every `.SchLib` should carry the **complete** parameter set for its part: the **typeid
-template's engineering columns** (all columns of that typeid's `template.xlsx` sheet except the
-internal bookkeeping ones — the tag `MPN_make_type`, `Skill Version`, `Template Version`, and the
-four `Library/Footprint Ref/Path` columns) **plus** the mandatory SOP params above. So a CER
-(ceramic MLCC) symbol gets `Capacitance(uF)`, `Tolerance`, `Voltage(V)`,
-`Dielectric(temp. Coefficient)`, `Operating Temp(°C)`, `Max operating temp(°C)`, `Package`,
-`Description`, `Manufacturer` from the template, alongside `Value`, `Manufacturer Part`,
-`Process`, `Vecmocon Part Code`, `ROHS`, `Datasheet`, and the second-source fields. Fill each
-from the datasheet; leave blank what the datasheet doesn't state.
-
 ## Writing them into the symbol
 
-Write the parameters straight into the `.SchLib`, producing a new file. Pass `--typeid` so the
-writer guarantees the whole template column set is present (blank where you didn't supply a
-value) — this is what keeps every symbol's parameter set complete and consistent:
+Write the parameters straight into the `.SchLib`, producing a new file:
 
 ```bash
-python scripts/schlib_write.py --schlib <in>.SchLib --params params.json --out <out>.SchLib --typeid <TYPEID>
+python scripts/schlib_write.py --schlib <in>.SchLib --params params.json --out <out>.SchLib
 ```
 
-`params.json` carries your filled values (and may include a `"remove"` list — defaults to
-`["Manufacturer_Name", "Manufacturer_Part_Number"]`, the Ultra-Librarian duplicates that get
-stripped). The script targets the component named in `"component"` (its Library Ref / storage
-name), or every component if omitted, and self-checks the output re-opens as a valid OLE. It
-handles any parameter-set size — small sets stay in Altium's mini-stream, larger ones are written
-as a regular stream automatically. Deliver the resulting `.SchLib`; have the engineer open it in
-Altium once to confirm it loads, then Save to Server with a revision note per the SOP.
+`params.json` may carry a `"remove"` list (defaults to `["Manufacturer_Name",
+"Manufacturer_Part_Number"]`); those Ultra-Librarian defaults are stripped and the SOP params
+added. The script targets the component named in `"component"` (its Library Ref / storage name),
+or every component if omitted, and self-checks the output re-opens as a valid OLE. Deliver the
+resulting `.SchLib`, and have the engineer open it in Altium once to confirm it loads, then Save
+to Server with a revision note per the SOP.
+
+Scope note: the direct writer keeps a component's `Data` under Altium's 4096-byte mini-stream
+threshold in the common case; a very large parameter set (or an extremely long datasheet URL)
+can push it past that, at which point fall back to the `altium_params.py` DXP-script path.
 
 Fallback (apply from inside Altium):
 
diff --git a/scripts/schlib_write.py b/scripts/schlib_write.py
index 4730cd6..ffc952b 100644
--- a/scripts/schlib_write.py
+++ b/scripts/schlib_write.py
@@ -29,7 +29,7 @@ IMPORTANT: this writes Altium's own binary format from outside Altium. It is val
 re-open as a well-formed OLE with every other stream byte-identical, but ALWAYS open the result
 in Altium once to confirm it loads before relying on it.
 """
-import argparse, json, os, struct, sys, hashlib
+import argparse, json, struct, sys, hashlib
 import olefile
 
 FREESECT=0xFFFFFFFF; ENDOFCHAIN=0xFFFFFFFE; FATSECT=0xFFFFFFFD
@@ -42,26 +42,6 @@ def le32(b,o): return struct.unpack('<I',b[o:o+4])[0]
 def pad(b,n): return b+b'\x00'*((-len(b))%n)
 
 
-# ----------------------------------------------------------------- typeid template columns
-
-# Template columns that are internal library bookkeeping, NOT symbol parameters.
-NON_PARAM_COLS = {"MPN_make_type", "Skill Version", "Template Version",
-                  "Library Ref", "Library Path", "Footprint Ref", "Footprint Path"}
-
-
-def template_param_names(template_path, typeid):
-    """The symbol-parameter columns for a typeid = every column on that typeid's template sheet
-    EXCEPT the internal bookkeeping ones (the tag, the two version columns, and the four design
-    Ref/Path columns). These are the engineering parameters that belong on the symbol."""
-    import openpyxl
-    wb = openpyxl.load_workbook(template_path, read_only=True)
-    if typeid not in wb.sheetnames:
-        raise SystemExit(f"no template sheet for typeid '{typeid}'")
-    ws = wb[typeid]
-    return [ws.cell(1, c).value for c in range(1, ws.max_column + 1)
-            if ws.cell(1, c).value and ws.cell(1, c).value not in NON_PARAM_COLS]
-
-
 # ----------------------------------------------------------------- read the container
 
 def read_container(path):
@@ -138,34 +118,16 @@ def _rec_name(block):
     return t.split('|Name=')[1].split('|')[0] if '|Name=' in t else None
 
 
-def _patch_field(block, field, value):
-    """Replace |field=...| inside a length-prefixed text record, re-framing its 4-byte length.
-    Used to set the component's ComponentDescription in the RECORD=1 header."""
-    import re
-    text = block[4:-1].decode('latin-1')
-    if f"|{field}=" in text:
-        text = re.sub(rf"\|{re.escape(field)}=[^|]*", f"|{field}={value}", text, count=1)
-    elif text.startswith("|RECORD="):
-        text = text + f"|{field}={value}"
-    payload = text.encode('latin-1') + b'\x00'
-    return struct.pack('<I', len(payload)) + payload
-
-
 def edit_data(data, params, remove):
     """Return a new Data stream: drop `remove` params, drop any SOP-name params (re-added
-    fresh), keep everything else, then append the SOP params. Also mirror the `Description`
-    parameter into the component's ComponentDescription field (the Altium 'Description' shown in
-    the component properties). Pins/graphics/tail untouched."""
+    fresh), keep everything else, then append the SOP params. Pins/graphics/tail untouched."""
     leading, tail = _leading_text_records(data)
     sop_names=set(params)
-    desc = params.get("Description")
     kept=[]
     for blk in leading:
         nm=_rec_name(blk)
         if nm is not None and (nm in remove or nm in sop_names):
             continue                                   # drop UL duplicates + stale SOP copies
-        if desc is not None and blk[4:-1].startswith(b"|RECORD=1|"):
-            blk = _patch_field(blk, "ComponentDescription", desc)   # component Description field
         kept.append(blk)
     added=[_param_record(20+i, nm, val) for i,(nm,val) in enumerate(params.items())]
     return b''.join(kept)+b''.join(added)+tail
@@ -249,20 +211,10 @@ def rebuild(entries, content):
 
 # ----------------------------------------------------------------- driver
 
-def write_params(schlib, params_json, out, typeid=None, template=None):
+def write_params(schlib, params_json, out):
     component=params_json.get("component") or None
-    fields=dict(params_json.get("parameters", {}) or {})
+    fields=params_json.get("parameters", {}) or {}
     remove=params_json.get("remove", DEFAULT_REMOVE)
-
-    # If a typeid+template are given, guarantee the FULL template parameter set is written:
-    # every engineering column for that typeid becomes a symbol parameter (value from the
-    # params if provided, else blank). This is what makes every .SchLib carry the complete,
-    # consistent parameter set the template defines — not just whatever was hand-listed.
-    typeid = typeid or params_json.get("typeid")
-    template = template or params_json.get("template")
-    if typeid and template:
-        for name in template_param_names(template, typeid):
-            fields.setdefault(name, "")
     entries, paths, content = read_container(schlib)
 
     # target Data stream sid(s): a stream named 'Data' whose parent storage == component (or all)
@@ -301,15 +253,8 @@ def main():
     ap.add_argument("--schlib", required=True)
     ap.add_argument("--params", required=True)
     ap.add_argument("--out", required=True)
-    ap.add_argument("--typeid", help="component typeid; with --template, writes that typeid's "
-                                     "full template parameter set (blank where not provided)")
-    ap.add_argument("--template", help="path to template.xlsx (defaults to the skill's)")
     a=ap.parse_args()
-    template = a.template
-    if a.typeid and not template:
-        template = os.path.join(os.path.dirname(__file__), "..", "assets", "template", "template.xlsx")
-    write_params(a.schlib, json.load(open(a.params, encoding="utf-8")), a.out,
-                 typeid=a.typeid, template=template)
+    write_params(a.schlib, json.load(open(a.params, encoding="utf-8")), a.out)
 
 
 if __name__ == "__main__":