Look what the postman brought me the other day: nice solid stepper motors with Tr 8 × 2 leadscrews. Perfect for the Z axis of the eShapeOko or Shapeoko. The motors seem good and the leadscrews are very, very nice. Tr 8 × 2 is just right for this application, unlike the four-start Tr 8 × 8(P2) available from RobotDigg, which does not have enough mechanical advantage and is too easy to backdrive.
Too bad the acetal (Delrin) lead nut on these is crap. Oh well. I really don’t have time to search for good nuts, so this upgrade will have to wait.
While I was writing this, the UPS guy came and collected the kits I had finished packing last night (except one already dropped off with Hermes, and one waiting for ParcelForce).