just picked up an SKS and was thinking of making a few relatively small changes. first the front sight post is a bit bent so it needs to be replaced. should i stick to factory part replacement or is it okay to take some of the colored third party options? either side of that would cost less than $10 to fix including the tool. can adding a T-rail to the gas port cover cause problems? kinda wanted to put a low power optic on the rifle and what i have found in researching proper placement of most low powered optics, they should be about mid length of the rifle. this is a bit past that but would be firm mounted more to the barrel than the receiver cover (which has a bit of wiggle on all SKS's). if this is okay to do are there any considerations i should take into account when adding metal parts to a wooden part? should i be installing columns to the wood before screwing the rail on? would it be a good idea to buy an extra cover to practice on? last thing is a spring loaded firing pin. ive seen a lot of different options for these and many of the sales groups say it decreases the likely hood of slam fires. anyone personally use these? will it actually help prevent this or should i just stick to giving it the extra care it needs?