I close the door to keep critters out too, like Jay does. No heat build that I noticed. For the brackets I had the same problem. I had a buddy weld the brackets on a 3"x6" metal plate and put 8 holes around the outside of the plate. Repainted the new plate brackets with some gloss white spray paint. Looks factory and is holding up well after 1 1/2 years.
If I did it agian I would use a 2.5"x6" plate. My door seems to be 90% styrofoam. Like theres a 1x3 running top to bottom on the left and right sides, with a big sheet of styrofoam in the middle. The inside holes of plate just missed the wood. So I'm only using half the screws. But with the bigger footprint its holding up great.
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2010 Kestone Laredo 291TG
2006 Dodge Megacab CTD
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