How do you run stock checks against Metrc? Building a scale tool and want to get it right.

I make build scales and make scale software (started for my own packing, filling and dosing needs in my edibles kitchen in Spain, but have added many more functions since...) and I'm now working on the dispensary side of Metrc. Before going further I'd like to know how operators really do this.

The parts I'm unsure about:

• Stock checks: do you weigh every package, or only spot-check? Do you use the "scale variance" reason (Nevada's list says about 0.9 g per lb), or always something else?
• Deli-style stores: how do you keep track of what's left in the bulk jar vs. what Metrc says?
• Incoming transfers: do you weigh packages before you accept the manifest?
• Pre-rolls / Each items: count by hand, or by weight?

What I built: an adapter on your NTEP scale's RS-232 port plus an app. Scan the Metrc tag with the camera, weigh, and it shows the difference against Metrc's quantity. The app proposes the reason within your tolerance and asks above it, then writes the Package Adjustment CSV with the signed difference and checks every row before upload. Weigh-outs keep a running balance per tag (your POS still reports the sales, no sales file). Each items are counted by weight.

Limits: CSV only, no live Metrc API yet. Not a seed-to-sale system (the scale's own display stays the legal reading.)

Looking for info - and maybe for 2-3 stores, ideally deli-style, to try it free! Happy to hear "we'd never use this because…" too.

Thanks a lot and greetings from Berlin,

J.