I gained access to the Starboard Chain-plate and discovered some surface corrosion but apparently no compression of the knee like what I found
on the Port side lower shroud. I expect some wood inside the knee may be rotted but at least the major cabin bulkhead and the fibreglass appear undamaged allowing a simple repair. The wood usually gets damaged when water enters at the top because it is not sealed to prevent water intrusion. Such was the methods of years gone by. Now the simple repair is to stabilize the rot and decay with penetrating epoxy and filling voids with epoxy with milled glass filler. Once cured, the knees can be re-drilled if necessary and new chain-plates bolted in without crushing the knee. The strength of the knee is the heavy fibreglass roving bonded to the hull. Stabilizing the wood within the knee using epoxy and milled glass prevents crush damage.
Starboard major chain-plate aft side of bulkhead (notice all the surface corrosion)
Backing plate on forward side of bulkhead
Penetrating epoxy being injected into small holes drilled from backing plate side (this is forward lower on Port knee). There are six knees in all and the worst appears to be the port lower forward which I am repairing now. On this one, I may apply a couple new layers of roving on the chain-plate side which is in the forward hanging locker. There is decent access to accomplish repair without tearing the interior out.