Ive run both V2 and Losi and i find the Losi to be the best still!!!!!
they just hold their pack better and r easier to build Ohh and the springs r better too,the latest batch of V2 springs rub on the shock body!!!!
Even try ed Big bores and found that the original Losi shocks the best!!!!!!

Associated pistons fit in losi shocks and as do losi pistons in V2's so if you need 3 hole pistons or 2 hole u can try more setups.
in my X6 ive been running 56 30w front orange springs and on the rear 30w ASS no 1's with yellow springs and find this works at all tracks so far ive been on.....
i run on hard packed dirt and clay tracks with carpeted jumps!!!!
try running different pistons its a small change but it can be a winning one!!!!