I love mine. I picked up the aluminum one thanks to a smokin deal from RCO - Thanks Marcus!
As mentioned, the easiest way to prevent the tail light shaving is to check and recheck clearances before drilling holes for the drivers side mount. Basically, the inside edge of the bracket will line up almost flush with the gate opening.
To access the bottom bolt/nut on the drivers side, reach into the hole for the tail light and move the piece of insulation (or whatever it is) out of the way.
One thing that worried me a little was the drivers side bracket didn't conform to the tub completely (1/4 inch gap at the top when the bottom was snugged down). Quick call to Gen-Right and my mind was at ease. If you have questions, do not hesitate to call - it took longer to dial the number than it took to get my question answered.