Thanks Ben, I use 0.2mm gap between parts with a very tight fit, but still separate. 0.4-0.5 is much more likely to work for moving parts, but you need slightly more on the first layer (or a chamfer) Where the gap is vertical (aligned with the layers), some trial and error will be required depending on the layer height and the printer being used. Also, where the gap is at some angle, the gap size should be measured perpendicular to the edges. Hope that helps! Regards, MakeALot

This thing is awesome! The coolest and most practicable thing I ever printed! Thank you very, very much! Kind regards Ben BTW: What tolerances you designed for the moving parts? Do you have any tips for someone who wants to design also more moveable, 3d-printed parts?