08 ego reg internals in an 05??

[Samwell]

okay shoot me down here but could someone tell me whats to stop me putting the aluminimum piston and spring rather than the washers in an 05 reg
is it different sizes etc
cheers

 

[Lump]

yes different size and the layout is different

 

[Samwell]

hmm i thought that was proberley it
thanks alot