I read something about that the TCR Valves(haven´t seen one) are a bit different than my TPX one. I think more volume in the Valvebody would get more fps !?!? If you got a pic of inside the TCR Valve ? i would like to have a look at to see the difference !
For example on the Phenom the same Valve System is working fine up to 300fps and more !!!
Here i found a Vid to have a look inside the valve:
Ther you can see that there is alot less material inside the TCR Valve.
I will go see if i can drill some material out of the TPX Valve.