NEW version 2.2 is now available for testing here: http://www.thingiverse.com/thing:1125286This version 2.1 is an upgraded variant of RichRap's universal syringe style paste extruder. It substitutes a few easier to find bits of hardware to replace the longer M4 stuff I had a hard time finding. I also spent some time cleaning up odds and ends fitment wise(more work needs to be done!) but it works well and take less time to print. It is based around a 10 ml/cc syringe. The best type is the Leur Lock ones with interchangable tips, but I've had good result with the measuring type syringe with the simple spout without needles.I've also made an adaptor to allow mounting on several Prusa style X carriages: http://www.thingiverse.com/thing:590801BOM for Paste Extruder 10 cc V2.1 ?_1 x Print - Plastic Body V2.1 Extruder ?_1 x Print - Gear and drive set (small gear, medium gear, large gear, idler block, syringe pressure block ?_1 x NEMA17 motor, 5 mm shaft? _1 x Drive gear T5 10teeth Metal drive Gear (you could print one of these) ?_4 x 624 bearings? _1 x 608 bearing? _1 x 20mm 8 mm smooth rod or M8 rod? _2 x M3 set screw for stepper drive gear & belt pulley _4 x M3 nuts, tension, drive gear & pulley ?_2 x M3 x 45mm bolts for idler tension? _4 x M3 x 10mm bolts for stepper motor mounting ?_7 x M3 washers?_3 x M3 Nuts?_3 x M4 x 30mm for idler hinge pin _1 x M4 x 55mm hex head bolt for the large gear shaft ?_1 x M4 x 45mm cap screw for the double/medium gear shaft? _1 x M4 plain nut for syringe clamp? _3 x M4 Nylock type nuts ?_4 x M4 washers, between gears and 624 in cap _2 x springs or Silicon pressure spacers for Idler ?_1 x small zip tie _1 x 5-6mm wide T5 belt(or to match pulley) ~about 40cm ?_1 x Plastic sheet to print on Standard 10ml Syringe - Luer Lock or centre slip types. Various syringe needles 1.8mm - 0.1mm - For Luer Lock syringe. Syringes with offset nozzles can also work, make sure to clamp in place so they don't rotate in use.