RE: Center roll-over not correct

[itswonderful@attbi.com]

This part bothers me.  Wouldn't the movement be highest and equal at lowest 
lifts and again at highest lifts?  Your working on equal parts of the arc on 
both sides of 90 degrees in this method.

Frank
> Ideal geometry will have a strike area of approximately .060" [1.5mm] wide, 
> central on the valve and have the major amount of roller movement at low lift 
> where the spring pressure is least.