Had a house fire that ended up rusting the AR a bit, particularly the screws in my Centurion Arms C4 handguard. Got all but one out that got stripped. Any tips on not damaging the rail to get the screw out? Figured I'd have to drill it but I'm nervous I'll mess it up. Also new screws are $2 plus $15 shipping anybody need anything from Centurion Arms so we can split the shipping? I hate paying that much for a $2 item.