I have a completely standard S400, which will give about 90 good shots on a 170bar fill. The rifle is running around 10.75 FtLbs with JSB's. Accuracy is good enough that I was able to manage 3rd place in the Hunter class at the recent UKBR22 Nationals. Personally I see no reason to fix something that isn't broken. I have had a regulated rifle, a BSA S10, the problem was that it was impossible to get it set up to shoot as well as the standard S400. It even went back to the BSA twice but they were unable to do anything with it, I was not prepared to pay to have it "sorted by JB" as it should work properly as standard, the S400 dose!
Alan
"If you have a rifle, and you line up back-sight, fore-sight and Frenchman, pull the trigger, the world is suddenly a better place." Bernard Cornwell, in conversation with Mark Urban.