As a "mechanic and engineer", do you not try to keep crud and corruption out of the innards of any mechanical device during disassembly and repair? Maybe like a flake of rust chipping off and scoring the finely fitted inner workings of a S&W revolver, especially if it has not been determined whether or not said inner workings are in good condition, by cycling the action?

Just sayin'.

(Former electric motor journeyman and engine builder, if you want to compare qualifications in things mechanical. Don't cause any more problems than those that already exist is the mantra.)