I dont know this for sure but I thought the proX rods where just reboxed chinese hotrods of wiseco's. Veshrah's are Japanese atleast, arent they? I still am hoarding an IMS proseries for my next build , but I'd like know what the concensus is on other rods for future projects.
On the pistons ,if your buddys in is at prox, just get the wossner stuff it is a work of art compared to any other bike piston. CNC'd "inside" & out & like their 90mm big bore pistons weigh within a couple grams of stock cast, which says to me they pay attention to balance factors too