I picked up a 1970 vintage lyman/uberti remingtom 1858, locks up tight, the bore looks near mint, a couple of rude looking screws, one side of the grips is warped, the cylinders seems to be .380” tapering down to .375 about 1/4” in and the cylinder has pietta 6m x .75 nipples. Also when the ram is dropped it locks up the cylinder pin or it did till I ground a clearance. Any ideas on how to make the grip flat, steam iron?