A few months ago I drove into the carport with the roof up. Ripped out the mounting bolts for the lift mechinism, destroyed the tent, etc. 
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Had the bus at the fiberglass repair place for two months. Long story short, the work wasnt up to what I would consider to be a pro level. 
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The issue I'm having is the bolt holes he drilled for attaching the lift mechinism appear to be 1/2" off from where they should be. This was noticed when trying to close and lock the top and it wouldnt do it.
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So I removed the bolts, and closed the top and lined up the brackets and it appears I'll need to drill new holes 1/2" from where these are now. 
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I know this will weaken and rip thru so should I add two meal plates, one onto of the roof, the other inside with the proper bolt holes in, to sandwich the fiberglass top after I drill these new holes ?� Will that work properly ?
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Bringing�it back to the shop for him to "Correct" this is out of the question.
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Thanks !