I think it's fair to say that there are threads on here which have pretty well established the transfer port dimensions, the bore and the stroke for the ultimate 11.2 ft lb springer.

If the new V-Mach tunes have the correct stroke length and transfer port size then they will be amazing.

If the stroke is too long then they may not be as amazing as they could be.

Don't ask me for the actual figures as I don't have them to hand

Matty