Review complete. I've written a comprehensive assumption register review to `output/register-note.md`.

**Summary of findings:**

All 20 assumptions are flagged—every one needs review. The oldest review is from March 2025 (Inventory turns, 568 days stale). Most reviews cluster between September and December 2025, making them 298–568 days old as of today.

**Critical gaps:**
- **Unowned:** A-16 (Merit increase) has no owner and should be assigned to compensation/HR.
- **Unsourced change:** A-04 (Average headcount) changed from 23.00 to 23.75 FTE in the Current version with no recorded source.

**Recent changes (5):** Active customers fell to 44, gross margin rose to 26.6%, headcount increased 0.75 FTE, list price increased to 4.5%, and days sales outstanding rose to 47.

Four of five changes are sourced and documented; three feed the EBITDA model (active_customers, gross_margin_pct, headcount).