So i have been doing some looking and saw a youtube video where they used black plumbing pipe as a frame. They used a tubing bender like the harbor freight one and it looked to work pretty good. I looked a bit and you can get that stuff for $10 for 10 feet. If i used that is it as strong as if i were to use square tubing. I don't really car all that much about weight. And also when i weld it for the basic frame can i wend the pipes end to end or would that be weak and break.