I agree with that Randy. But I question why, because typical use results in high corners and ends -dished in the middle.

3 hours on a coticule should do it I'd think.

Which is the reason for my pointing out making circles is not the best approach and just perhaps the cause of low corners which in the extremes of accuracy would require some deft hand work to have equalized pressure as you come round and round

Whatta ya think?