I would like to hear from you if the difference between Revo whatever version you play 12,4 or 12,9 and Becue Prime-M 12,5 (not 1st generation of Prime shaft!) in both deflection and energy transfer is so you can feel it immediately after just a few shots or is it just so slight between them... What I have heard from a strong player who played with Revo 12,9 and tested both new Prime-M versions: 12,00 version has less deflection but worse energy transfer and 12,5 mm is better in energy transfer so I assume 12,5 Prime-M is very close to Revo...For me as for being very tall and that's why building a 62" player for myself
https://forums.azbilliards.com/showthread.php?t=463154 the major advantage of Becue is the possibility to get a 31" shaft from them. I don't know if the others will offer such an option.
P.S. As for energy transfer I'm so sure if I match my butt with that wood combo and construction with suitable length c.f. shaft it will be not so easy to find a better combo as for energy transfer

. I know so many are more concerned about the shaft but I believe the butt is of great importance too (it is not only the weight, the balance and the look like most think)