Lot tracking spreadsheet — collecting data, ping me if you want columns

I've been maintaining a spreadsheet of vendor/lot/COA quality data for the last 18 months. About 230 lots from 14 vendors so far. Patterns are clearer than you'd expect.

Correlations: vendors with consistent third-party COAs have far fewer purity-drop incidents lot-over-lot. Vendors with rotating third-party labs have intermediate variance. In-house only has the widest variance.

Not sharing the raw data publicly but happy to add data points if you want to contribute lot info.