I replaced the cockpit drain Spartan seacocks with Groco ball valves a few years ago on my 34.
Took me the better part of the winter to do so (Spartans were frozen). Also replaced the drain hoses & all
the connecting hardware:
/g/SabreSailboat/photosearch?p=created%2C%2Cseacocks%2C20%2C2%2C0%2C0&q=scimitar%20seacocks
I've also installed 2 below deck pilots in the lazarette and had the rudder out a few times, so I've spent a bit of time in there.
At the time I was 70 with substantial arthritis. Yes, access is difficult, but doable. If you can't get in & out, who's doing the annual maintenance (rudder lube, cable adjustment, packing gland, seacock service & general inspection)??
OK, the yard can do it if you trust them, but if you have a problem while underway (compromised hose, attaching hardware or rudder gland issues) you may lose the boat & more:
https://www.latitude38.com/lectronic/cruisers-rescued-from-sinking-boat-en-route-to-seattle/
This is not a criticism of any lister, but something to contemplate.
--
Phil Horn
S34 #67
Huntington, LI, NY
Philip Horn