Going to buy the Bold Optima trigger and install it on my 93 Spanish Mauser. Know I'll have to make some relief cutout for the safety in the stock, but would appreciate any other tips or advice from those of you who've done similar installations.

I just put the same trigger on a Mark X Mauser and had to make a small semi-circular cutout in the trigger guard for the lower rivet on the safety to clear. If it won't screw into the stock properly or if the safety doesn't want to work, that's probably what's wrong.