Complete. The assumption register review is at `output/register-note.md`. 

**Summary**: Of 20 assumptions, 4 are flagged. Two reviews are stale (Inventory turns and Line of credit interest rate, both 6+ months old), one assumption lacks an owner (Merit increase), and one assumption changed without a recorded source (Average headcount, which feeds the headcount driver). Five assumptions changed in the current version; the most impactful are a 2-customer customer decline and a 0.4% gross margin uplift from vendor pricing.