I am figuring a 20 inch f/4.1 mirror with a sub-diameter 10 inch pitch lap. I want to use a W stroke more.
But I am not sure exactly how to do the stroke correctly. I need to deepen the centre and middle zones compared to the outer zone. Should I do a narrower W stroke nearer the centre and a wider one further out? Or keep the stroke the same all the way across the mirror? I have read explanations for the W stroke MOT. But cannot find any for TOT.
I am using a powered turntable rotating at around 3 rpm and figuring by hand. I have been using centre over centre strokes with various offsets from the centre, but I think a W stoke should give a smoother surface.