The easiest way I found to do alone is mark the center of the rail, measured from each end...then find and mark the very center on the bow...put one or two screws there and tie a rope to each end, pull them back past the stern and tie them off to something...that puts just enough stretch and has them going in the right direction for installation...CLEARANCE holes thru the RR...shouldn't bite and when you run the screw in, don't go down too tight or it will pooch the RR out....agree w/the heat gun for sharp turns...not too hard...Have 3-4 tubes of 4200 to seal the gap underneath your newly installed rail and yer ready to go...