Layer thickness for everything: 0.2mm Print the following parts at 100% infill: Small Gear, all three Idler parts, Bearing Holder, Bearing Axle, Fliplock and UM Mount. The rest can be printed at 25%. Print the Fliplock very slowly, otherwise the round parts will sag too much. Other than printed parts you will need: 2x 608ZZ bearings 1x 61801 bearing (OD 21mm, ID 12mm, H 5mm) 6x M3x20 bolts, countersink head 2x M3x16 bolts 4x M3x8 bolts, countersink head 1x M3x30 bolts, countersink head 3x wide M4 washers 9x M3 nylock nut 1x M4 bolt (some 15-20 mm longer than the spring you are using) 1x M4 nylock nut 1x M4 normal nut 1x tension spring