You need a stock wrench, you can use a torque wrench to torque the tube to the recommended setting (i did, just cause I bought the damn thing) and a flat-head screw driver. Having access to a vice made removing the LMT-staked castle nut a breeze.
If you want to "set" the UBR to deploy to a certain setting, or if you want to remove the doors, you'll need allen wrenches, and that's it.
It is actually pretty easy- if I had it to do over again, I'd have taped the tube wrench section of my stock wrench with duct tape, as the nut-portion of the tube sustained some marks, but otherwise (other than possibly, the fact that a spring may have sprung from the UBR, as unliely as this may be) you'd never know that it wasn't professionally installed.
Hm..... not that I think about it, I should probably have asked the seller about the spring....