I was reading BlackVCG's thread on it, and was just unclear. It says RT Pro Stainless valves you cannot use unless modded. What does the stainless part mean? I thought all RTP valves were stainless as in the reg half is aluminum and the on-off/powertube half is stainless. I have a RTP valve that is half aluminum half stainless. Look at the pics and let me know if I can install ult or not. I am not going to do the mod if I can't use ult it is not that big of a deal. Thanks for your help!