Woodfin's SS GT/TB construction series

[Dragsinger]

So how do you cut a tube with an odd shape?

Wrap construction paper around the tube you intend to install. Tape well and cut the paper tube to fit the location. Slide paper tube over metal tube, mark with soap stone, cut to fit

Again, the camera is unkind about surface rust. That tube is much cleaner in person. The surface rust buffs off easily before welding.