And if you find your regs have been marked by reg techs or by you trying to access over tightened components or opening things before doing a full check and solution soak to loosen them, and know whats going on, or what really requires adjustment or servicing in the first place, tap back very gently with a very small ball peen perhaps in unison with a polished, rounded home made drift punch of soft material the displaced reg material in place as closely as possible before or rather than filing, removing burrs too much and chrome.