Re: Symmetric Rudder damage and surprise hardware!
If, in the course of cutting away material around the bolts it looks like molded recesses for the bolts themselves, it may have been an original way of joining the two halves of the rudder, not wishing to rely 100% on adhesives or glass...
Too bad Clark isn't still in business.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)