Swift 18 Owners

I'm just about to redo the headlining etc and having stripped all the foam and vinyl from the coachroof, I've exposed the chainplates. They seem very close to the windows and I was wondering if it was worth the bother of tying them to the hull somehow. Perhaps extending the backing plate and then using a turnbuckle to connect it to the hull where the inner molding joins the hull and its double thickness? Anyone else done anything similar or is the coachroof strong enough and I should leave as is?

I welcome anyones thoughts!

Robin.