I have a 1979 Catalina 27 with all four bulkheads rotted. I know I need to replace the bulkheads that the chainplates are attached to, but are the two forward bulkheads really necessary for support of the deck? It seems the molded deck and hard headliner are so solid, that I wouldn't think the fore bulkheads matter. Also, these bulheads are just screwed in with no tabbing, in fact none of the bulkheads have tabbing. I have read some of the other threads about bulkhead replacement, but any infomation, guidance or additional tips are greatly appreciated. Thanks.