Hey Dan! Good to hear from you.
Buddy has a fridge that we use, and one is on my short list of to-buy. I also use it for power tool battery charging. Works great.
Yeah those are the "old" style according to Leer. These "new" style actually go thru the fiberglass, rather than around and on top of it. I've never read of any problems with either design, but Leer says that the thru style should (in theory) make the hold even stronger than before.
Ya like you said earlier I would want a piece of support metal along the whole rail if i went through the glass...