As 2 or 3 people may have noticed,I just made a 2x4 frame with a pink foam center, replacing the 5/4x6 frame with 1 inch foam center I had used for several years. The frame supports the weight of the TC and the foam basically insulates the basement. The foam never showed signs of sinking into the bed sheet metal. I made the new frame to get additional height so I could slide my rear deck in without interference from the bumper. I also wanted more clearance over the cab roof. There were a couple additional things I wanted to add to the new design, I'll call them improvements. We've been on the road about 10 days with the new bed lift setup and it does work better than the old one keeping the TC aligned and centered straight. This frame and foam is not too heavy. Weight always being a consideration. This setup is working well for me. I have no need for a bed Matt. There are many ways to achieve the desired amount of lift and stability. Whatever works for you is the answer.