Viscous Fluid extruder: Grease Gun

Viscous fluid extruder for my 3d printers main barrings, I picked up a can of barring grease and just filled the tube and it works really well. I did have to sand the bottom of the pump section so that the tubes would fit together due to the base of the print being squished slighly, but other than that it worked out really well, just make sure you use all the grease in the tube before refilling it or its gets a pocket of air trapped inside and pushes the ram out of the cylinder.