try minichopperplans dot com as they have two sets of plans that you can buy for twenty bucks they will bend .5" to 1.5" tubing. The only tricky thing is the die which can be machined easily.
I am currently making one out of scrap metal and so far has only cost me $10 for a 4 ton jack.
Give me a e-mail if you have any other questions about the plans. |