Re: Center roll-over not correct

[itswonderful@attbi.com]

I should clarify that I think it is possible to get the contact patch 
symmetrical with this approach but half lift will not occur when the tip is at 
the centerline of the stem but rather somewhere past centerline.

Frank
> Also if you take a look at the geometry involved you will see that 
> it is technically impossible to achieve total symmetry about the valve stem 
> centerline using my original method, at least with typical roller valve gear. 
>