Like Dave, I have moved dozens of desks on their backs with the modules in them. It adds to the structural integrity of the frame and profiles. You can get the desk on the truck on its back, get the modules into the buckets and then strap it all down. If you need to you can remove the modules when you arrive at the destination and move the frame thats fine. Takes more time but is much safer. If you are transporting on its back I recommend two long 2x4s, one across the meter bridge and one across the fader buckets where the bolster goes. This helps spread out the pressure from the ratchet straps. The movement of the frame in vehicle transport is what causes it to twist and bend mostly, all that weight constantly shifting around. Modules help mitigate the flex.