the measurements are done in a straight line, not down the slope, a bit like lo=pros, you measure across
I would have thought Murts that you measure from a line perpendicular to the stem centred on the intersection of the centre line of the quill and the centre line of the stem to the centre of the clamp...
I would have thought Murts that you measure from a line perpendicular to the stem centred on the intersection of the centre line of the quill and the centre line of the stem to the centre of the clamp...