Alternative X2 small bore pistons

[Funracer]

I'm thinking about testing my X2 with different (self drilled) shock pistons but I can't find the original ones in any shop. The same goes for the new Carson part numbers. What brand can be used alternatively? I heard that RB5 ones should do. Is that correct?

Cheers, Norbert

[Adam F]

Kyosho small bores are fine..

3B seems to be the norm...