So far, the hardest part was drilling the frame for the rear jack mounts. I have a new set of Milwaukee HSS bits, and it was still a chore. It's just not a comfortable position to work, so expect to be sore. Per the instructions, you mount the rear jacks as close to the rear spring hangers as possible. Depending on the slide mechanisms, that will dictate where to put it. I did the one under the living room slide first, since that had some mechanism placement to consider. Then I just aligned the one on the opposite side with it, within an inch or so.
The set comes with self-tapping bolts for mounting the rear brackets to the frame, but I prefered to use regular bolts with locking nuts. To do so required cutting a small flap in the belly cover, inside of the frame, to get my hand and wrench up there to hold the nut while ratcheting the bolt home. Again, working alone it was not comfortable, but I got 'er done. Just don't drop the wrench on your nose while you're laying on your back down there. It hurts. I'll tape the flap shut when I'm done.
Larry (SouthernNights) posted some pics of his install (I downloaded them) and there was a write-up (with pictures) on another forum, as well. As for the control box, I haven't gotten that far, but I'm planning on mounting it to the forward basement wall, next to the propane compartment box. Still accessible, but not it the way. I'll thinking of dropping the belly cover in sections to fish the rear wires forward, too, rather than running along the outside of the frame.