Been reading and watching here for a long time and since its a bit slow at work i decided to finally start. Side rails are 3 x 6 7ga and the cross beams are 4 x 4 x 10 ga. Leveled everything up and im dead square cross corner. My problem now is the top running surfaces are not even close to level due to the cupping of the tubing. Was thinking of going with epoxy but id thought i poll and see what my best options are. Thanks
dave