Am looking at purchasing an 84 O'Day 222. Have seen a few posts on this subject.Observed hairline cracks around mast step and what appears to be a modification by the former owner. Two hex head bolts exposed on the cabin top, drilled threw and secured to the two "L" brackets on the bulkhead. Other posts reference a potential problem with this area talk about a stainless post or angled brace attached inside to the tabernacle bolts and then to the bulkhead. Where can I get more info on this fix?