Since this is now a weight loss thread, I'll post here.

Took my scales in Monday to Champion, and tested them with 500lb and 1000lb NIST class F certified weights.

This is the state stamp showing this weight was legal for certification purposes



This is what a 1000lb weight shows up as sitting on the scale:



We tested all 4 pads with both weights, 2 were dead on, 1 was 1 lb light at 1000 and dead on at 500, 1 was 2 lbs light at 1000 and 1lb light at 500, which is well within the "of scale" certification limits for it's 6K lb rating, which means they can be 7 times more accurate than a 80,000lb truck scale @ 3500 lbs.

tl:dr summery: my scales are confirmed accurate.