When I eventually get around to it, I'm not going to make an adjustable one (to easy to damage in my books) but rather make differnent size ones. If the adjustable ones have a thread with a 2mm pitch, then you'll only have adjustment in 1mm steps. When somone wants a different torque arm, I can send them a selection, and they keep the one they want, and send the rest back. I'm going to make them out of T45 tube, so you shouldn't damage them at all, (if you do damage them, It won't be anything to worry about, because the rest of the bike will be trashed )