[Beezer]

If you use a 4x8 piece of 3/4" plywood you shouldn't have do any cutting and it will be strong enough so the tailgate and floor is not dented. You would still need something to keep the tire off the back of the bed.
One advantage of the ride on chocks like the Condor is it makes loading the bike a one man job assuming you get the Big Bike Ramp. You can actually step off the bike when its one the truck and the chock will hold it upright. They were doing demos at Bike Week and claim you don't even have to use tie downs but I wouldn't trust it that far. I have seen some of these ride on chocks for $169.