What about a B/P or IMOW machine where you use the original chassis? I took your advice and looked in the builds section. The problem with square tubing is you block all the mounting holes for your foot rests, clutch pedal and front axle. I bought hot rolled angle iron and was planning to square it up and run it down the inside of the chassis but that seemed foolish because I'd have to come back and put holes in it for mounting and then break it up through the axle section. I did see a bolt on cross member section. I love the way that looks. Maybe that's the best way to go. Square up the frame, drill the holes, tack some nuts and then build a square cross member section to run across the bottom.