Wicked Fantacies
+1y
The corrugated back wall is like to give that big empty area a little strength rather than a flat peice of metal back there although it can be done by shaving it but I usually still put some 1" square tubing behind it. But as stated previously it would be easier to just cut the back wall and meet it all back up giving it a factory appearance. Hope this nonsense is useful somehwere.