J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment J 30 bulkhead technical discussion

I'm assuming you left about an 1/8" all the way around the plates when you redid the core area were the chain plates go thru the deck If so all you need to do is install te plates then pump the area full of silicone which will flex with the boat underload then put the caps on with a good bed of the silcone

You should be good to go with that for a couple of years