I've been fooling around with getting the stones "flatter". I can get within 2mm variance and remove visible dishing by eyeballing stone. I measured stone below after initial flattening.
Question is would you flatten further to reduce the variance? I tried with one stone (even found a feeler gauge in the back of the toolbox) and got it to less than 1 mm variance overall and reduced dishing to less than .25mm. But I washed a lot of stone down the drain doing so. I'm thinking this is past the point of diminishing returns and the calipers and feeler gauge can go back to the toolbox.
Curious as to how others flatten.