If the tailgate is up it looks good with duals but when its down I agree it dont look good with the tailgate down. He said something about getting a tool box so I dont think you will see all that mess.
Or do the split under the bed, and have 2 holes...
But the tool box would be the best... Mount it behind the stack, towards the tailgate... Then get a small section of what ever the tool box is made of to cover the slot between the cab and the tool box, and wa la... Instant hide a stack... Well the ugly part of it anyways....