Mostly metal working with emphasis on model engines, tool making and use, and some electronics and Arduino. For design work I use Microsoft Visio for 2D CAD and Fusion 360 for 3D modeling. Machine tools include a 1952 Logan 11" lathe, an Enco Mill/Drill converted to CNC, generic floor standing drill press, home made 2 x 48 belt grinder and 4 x 6 metal cutting band saw. I mostly use carbide insert tooling on the lathe although I keep thinking I'll get more serious abou using high speed steel.