HMS Beagle wrote:
The box on a Lance is built quite differently than a Bigfoot or NL. Here is what I did. I used 1/2" plywood because I didn't need any more rise. I did something similar with my old camper and truck, but spaced 1/2" on top of 2x2, with 3/8 on the bottom. On a BF, the 2x2 really only needs to be around the perimeter, as that is the only place the camper will put any weight. I hung the plywood out the back about 6" to eliminate the hard spot created by the end of the bed. On top of this is a 3/8" truck mat. You can see the black spots from the mat is where all the pressure is. That's right where you have nothing with a 4x8 1" mat.

Interesting. Some manufacturers want you to remove the plastic bed liners, 4 Wheel campers is one.