Rudder Replacement

Cc seems to have used sealant rather than adhesive on such fittings so I wouldn’t expect it to fight you too much. Even if it does take some tapping from the top, youll already need full access to do the swap... Might as well jump right in.

What is the negative, if you hit something the stainless is strong enough to break your fiberglass support???

If you have not removed 5200 before it can be done without too much trouble.
I popped my strut off using some wooden door shims. Bought a pack at the lumber store for about $3 comes with about a dozen shims.   Tap one of the wood shims in between the rudder port and your hull. As soon as one starts put another in next to it then tap back and forth between them. The wedge pops the part off the hull and the wood did not damage my hull at all.
I have also heard you can use a wire and cut through it. They sell wires and handles for taking out glued windshields so that might work as well.
I cleaned off the extra material off my hull using a Gasket Scraper, I sharpen mine with a wet stone and it took off the 5200 without any hull damage. Of course you have to use restraint so you don't dig it into your hull but a little care is all that is needed.