I'm not going to use any other drill parts, just the ring gear and the motor itself. The setup will run like this:



I'm off to Lisbon today to meet Alex, who's on holiday, and Guilherme. I cut a strip of 4cm tall 2mm steel this morning, which when I get back I'll bend around the wheel, to hold the axle, motor face, and be armour of sorts. I don't know how it's possible that I've gone from the weapon-ed beetle to focusing on this in about 36 hours, but I have!