Chris - there's an access panel behind the setee cushions on my boat to get to the stanchions. I haven't looked at the plate but would think you'd be able to rebed them without having to take the stanchions loose. My last boat just had a stainless cover that went over and around the base where the bolt pierced the deck. I just had to unscrew that and lift it up, clean all the old sealant off, and rebed it. Hopefully it's that easy on the Cal.
I haven't raced her yet. Just got her this summer and had to wait until mid July to get the mast stepped and rigged up. Our fall series is starting next month so I'll be interested to see how she does on the upwind legs. Had her out two weeks ago and hit 7.0 on the knot meter on a broad reach - so she will get up and go off the wind.
Good luck in your race and on your maintenance.
1987 Cal 28-2
New Name TBD