me and a few mates played with the bender for the first time on sunday and came up with this for a rear bar on the 40.

imagine it flipped 180 deg and on the rear.. kind of like this..
I was planning of getting some 10mm thick plate on the inside edge for mounting to existing holes in the rear bumper with suitable gussets to add strength. The tube is 32nb (42mm OD) with about 4mm wall thickness.
My first question is.. Would it be possible to integrate a some sort of stub axel(?) in there for a spare wheel carrier or is there just not enough metal there? Could you sleeve some box over where the stub axel goes for more meat for strength? with suitable gussets to the bar that runs under?
I was also thinking of putting the hub on the rear bar so there isnt the spindle sticking up when not in use. would this be better/stronger than having a spindle sticking out? I was hoping I could have one on either side.
2nd question is, if I wanted to put the hayman reese towbar receiver in the middle, what kind of bracing would be required to make it strong enough for towing, recoverys? another 10mm plate on the inside of the rear bumper/crossmember? I would have to cut a hole big enough for the receiver to fit and this might take out the middle 4 bolt holes. (refer to pic)
I'm pretty new to this metal fabing game and wouldn't mind some feedback from you guys.
thanks.
Andrew