Harry's Paste Extruder

Remix of the Spritztruder by Kitemare, for i3 Rework. I also used a modified idler from the compact E3D extruder by Mak-a-Face. Modified to have better support for drive gear. Also uses typical herringbone gears from greg's accessible extruder, so hopefully is a bit easier to incorporate into existing systems. Also modified to fit larger capacity syringes - 30ml ones by Terumo (from eBay), have OD of 25mm and ID of 22.5mm.

I tested Kitemare's Spritztruder and found the gear ratio to be OK whe