3D design skill tutorial

SketchUp is a general-purpose 3D design software for makers that is free in its basic version, and is very popular. There are dozens of other programs for precision parts, or organic shapes, but SketchUp scales nicely between 3D printing to woodworking to architecture, and is super easy to learn. By far the best tutorial on how to learn SketchUp (a skill transferable to most other 3D apps) is this free YouTube series, SketchUp Tutorial by April Wilkerson. She is an ace teacher, with the kind of practical hints I needed.  — KK