That trigger truley lasted the test of time. My trigger creek is almost nothing ( probably much less then yours ) and it still holds solid. The trigger and the release mechanism are the same metal and it's hard as a rock. Being the same metal, one will not win in strength over the other, therefor, they should never have the problems you fear. The metal like the fireing pin is a bit brittle, so it is in fact a bit easy to cut but it's still hard. Heavy duty spring steel and the like are the hard stuff to cut. My gun has had it's trigger pulled thousands of times and never even started to wear down.
The sideplate does not need to slide rearword to come off. You can actually just peal it off from the back forward.
