rpm1
01-10-2011, 04:34 PM
in relation to a symmetric ball i follow the three steps 1 drilling angle 2 pin to pap distance and 3 the angle between pin-pap line & the val however my question is to do with measure back ie vertical & horizontal components of the bowlres axis coordinates.these are the two distances which allow you to locate the centre of span and hence layout finger & thumb holes My question how are these distances found