Well I got back from their house.........problem is a lot worse than I thought. Their "friend" pretty much notched 90% of the joists for the track of the opener and a couple of them (9 in all) he notched about 80% thru so no wonder the roof is caving in............
This was my answer for them Liftmaster 8500.....................running at about $500(Canada) that should have been installed day 1 and no issues with the roof would have occurred..Maybe they`ll listen this time....
Notice there is no middle track involved........