[SloopJonB]

If you are having new stuff made up, why not use the tie rod system - it's well proven. Get a deck tang fitting welded up to suit, have a matched piece for under the deck with an eye in it and a tie rod to connect there and to another eye on the stringer or in the bilge or welded to the mast step if keel stepped.

Makes a tidier and simpler installation than forcing flat bar through all those gyrations.

 

[SloopJonB]

Your design looks just fine to me - bolt it through that bulkhead and call it done.

I agree with Faster though - I'd put at least two more layers of glass on all that tabbing

 

[SloopJonB]

The flat bar looks good to me. Pretty standard sort of setup. I prefer to avoid welds on things like chainplates if possible,