Double Barrel Extruder

This is yet another type of extruder. I was not not happy with the performance of some of the "pinch wheel" type extruders. I waited to publish until I had gone through an entire 5 lb. spool of ABS and have done so now without any problems.
While I don't expect anyone to build this I thought it may inspire new designs based i this direction.
This was designed in alibre and openscad.
All files are in the zip file (Warning: File Dump)
I am in the process of designing and building my next pri