I've posted this in couple of other forums on MTBR but I figured I'd ask here also. I just built a 2010 SX with RP23. My previous 06 SX (RP2) I was able to put 175-200 psi for trail riding and put around 250psi to stiffen it out for dirt jumping. I have put almost 300 psi in the new one and doesn't seam to do much. Is the Specialized valving that much different? Do I need to have it PUSHed or has any one tried a DHX air?