Yup the tractor stuff is pretty sweet. Ive got a lot of friends that work at farm/ tractor repair shops that I could get some from. Case sells some really sweet stuff it comes is 5' lengths. Its pretty spendy so Im waiting on a buddy to cough up some $$ to split the cost. As for the square stuff thats easy reciever tube. I used 2" tube outer and 1" inner. I figure I can pretty much land on the DL and not destroy it.
WT
