Installed the the Retrax PowerTraxPro XR today. Instructions say it's a two person job. So, of course, I did it alone. Smashed 3 fingers and I'm not in the hospital so I'm considering this a success. Easy install. Spent a good amount of time routing the wire harness from the battery back to the bed. The rolling motion is supposed to smooth out over a couple days. The space left after install: 1) from back edge of canister to the inside surface of the tailgate, 52" 2) width between edges of rails, 58" Very pleased with this cover!