I have a CSY 37B and want to remove, inspect and replace the Chain Plates! Has anyone removed the Chain plates on the 37? It looks like there is four bolts that run cross wise for the Upper Shroud Chain Plate and the bolt heads must be located behind the rub rail. The Forward and aft lowers are similar and one more that looks like it is behind the lower teak strip under the Cap Rail. Does anybody know if the bolts are removable without tearing the rub rail apart, fiberglass work etc! I tried to remove a couple of the nuts but the bolts just spin. I am pretty sure they were changed before I bought the boat and i have had her for 17 years and she is 42 years old! They look good but they make me nervous!!! Any feedback is appreciated!!!