I started grinding my 6 " today ,, good fun
I measured the sagitta as being close to f 8 quite quickly it seemed
after a few wets at 1/3 COC I checked it again and found it it was .75 mm (target 1.15).
I believe I maybe bought the chordal strokes in to quickly and when
changeing strokes to a more spherical action lost the high area around the outside of the blank loseing quite bit of my depth. ?
as this is my first try its all new .
Right now I've been sticking with 1/3 COC MOT and the sagitta
does seem to be getting deeper (slowly)
any quicker way to proceed ?
input most welcome