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

Could someone explain specifically what the issue is here? When we bought #426, "J/24 bulkhead" issues were brought up as a concern but I was told that the plywood/bulkhead issues were solved getting rid of the plywood in the bulkhead on the J/30. But, this sounds like there's balsa core behind the chainplates.

Does this span the entire bulkhead? OR, is it just in the deck area around/above the bulkhead?

When I heard the plywood-J/24 issues had been fixed on the J/30 design, I sort of moved along. I have rebedded the deckplates/chainbplates at the deck with Sikaflex a couple times. But, any background and definitive details would be great here.

Thanks (and sorry if this has already been covered elsewhere in a post)!
- Jeff