I just put a 2" hitch receiver on the back of my Montana on the entrance side. I will use this for my Freedom Grill barbeque that is made to mount in a 2" receiver. To make a rear bumper with a centre hitch, I will do the same thing on the opposite side and make up a bumper that attaches to both receivers.
I just used a short piece of 2 1/2" angle iron that is 3/8" of an inch thick. The Montana frame is about 2 5/8" wide on the bottom and I attached this angle iron to the frame with two 3/8" bolts one hole on each side of the centre web of the I-beam. I then bolted an 18" long piece of 2 1/2" square tubing, sched 80, to the vertical section of the angle iron. This is very rigid and strong. You have to cut a little of the aluminum skirting and the plastic underbelly away to expose the Montana frame . The frame is about 1/4" thick and when you bolt the flat side of heavy angle iron to this frame, one hole on each side of the centre web, it is very solid.
If anyone wants a pic, let me know.
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