I've got the same rack but it's the 4 bike. Works great, much better than a tray style for 4 bikes. I have a 42" extension on my camper, a traditional 4 place tray rack puts the last bike 8' from the bumper! Way too far, leverage and clearance concerns. These north shore racks are very well built and there's no concern for the rack failing. I'd definitely beef up your extension though, I made my own similar to the super truss design. Imagine a 200 lb adult standing on that extension you made as it goes through a highway dip at 60, things will bend/break!