I have it mounted to my stock bumper, it's worked loose a few times and the bottom bolt on the spindle fell out on once - a dab of blue Loctite and it's been solid since.
I run the gas tank, with a 37 and the rear view mirror is basically a decoration - will be adding rear view camera.
if you decide on the tank, use anti-seize on the tank mounting bolts. that tip was not in the instructions and when I tried to remove the tank I stripped out a couple of the nutserts from the tank (aev told me I should've used anti-seize :doh

. not sure how i'll fix it yet but also looking for a way to mount roto-paks instead of the AEV tank
the tank is nice that it's tucked up and out of the way but siphoning then storing the hose is a PIA, right now I bungee the hose in the bag it came in to the backside of the carrier (between the Jeep body and AEV tank). When siphoning the gas out, I can't seem to get it all out and that concerns me with allowing the fuel to go bad.
I need to get some pics of the carrier but it's similar to all the others only with the stock bumper.
all 'n all I like it but not 100% sure I'd buy it again.