I want to add cleats about 4 or 5 feet aft of the side stay u-bolts to use for spring lines. I found a couple of neat 5" Chrome pop up cleats thanks to an earlier post on this site. They should fit perfectly into the rub rail formed by the hull/deck joint. Question being is there any metal band encased in the fiberglass that, if cut, could damage the integrity of the rail? Is 4' from the stay u-bolts far enough away? Installation will require a couple of 3/4" holes for the cleat to retract into and a couple of 3/16" holes to fasten.