Rat,
We will have to agree to disagree.
I am looking in post #1, can only just see part of the shaft, but looks to me that a line drawn up through the shaft mounting bolt & a line drawn from the roller tip contact point & shaft centre would intersect the first line at a 90* angle or a bit more. Lifting the rocker up with shims would move the roller tip even closer the valve edge, exh side, & it is already biased towards that side.