Thanks James for the suggestions- I know you must be juggling a *lot* of issues right now, and I very much appreciate your personal help & support.
You are correct that my PCB shows “RevI 04/2015”, and the 3.3% offset you mention sounds exactly like what I am seeing on the VDC scale (except for the drift over time?).
I just checked resistence measurements: in lower ranges (100’s of ohms) Mooshi matches my Fluke to 1% or better, at higher ranges (K-ohms to M-ohms) I’m seeing a 2%-4% high reading, similar to my VDC results. Not totally wonky, just a bit off…
I’ll get the release 19 APK today, and report my results after loading.
Thankyou so much for this device, and esp. for your stellar support-