These movies cover some techniques for designing sheet metal objects in TouchCAD.

Sheet Metal Design (7.2 Meg/ 12 minutes) .illustrates how to use some of the relevant tools found in TouchCAD as they are or as a base for modeling custom objects based on them.

T-Tube Joints (5.6 Meg/ 5 minutes) illustrates some useful techniques when jointing T-tubes manually at any angle.

Background Image Modeling ( 9.8 Mb 7.43 minutes) illustrates how to model a 3D shape based on three in-scale background images. The model is a sheet metal based ventilation component.