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“My Dad was a mechanical engineer,” TTAG reader revjen45 wrote in a recent comment. “He told me that the people who designed and developed a mechanical device put a lot of time and thought into it, and anything I did to change it was more likely to have a deleterious than beneficial effect.” God knows I spent enough money modifying cars to learn that lesson: if you want something better, buy something better. Then again, most products are tuned for most people. What’s a little trigger job between friends—other than invitation to a light primer strike. Hmm. Does stock rock or is it just a starting point towards perfection?