I've been working on an SFX100 build. Yeah i know its been a long time, you thought it was long finished. Not so much. Back in October I'd started on the 3D printing. I got a single set of prints completed, and went through the process to assemble the first actuator. This went reasonably well. The instructions are pretty good, I used a dab of superglue to hold the o-ring onto the bump stop and discovered that you can't get the grease gun on once the slider is fitted to the ball screw.