Bender I use: http://amzn.to/2mAXQqX
Cheap Jewelers Torch: http://amzn.to/2lPWIkZ
Nicer Jewelers Torch: http://amzn.to/2m3wYCc
TIG Welder: http://amzn.to/2m3xwIg

A quick overview of the method I use to build a chassis. This chassis is actually solid rod not tube but most refer to a crawler chassis like this as a "tuber". For a copy of the templates I use you can visit my website and download them for free. www.HarleyDesigns.com and look under the Ibex section.