RepRapPro Mendel Tricolor direct-drive extruder

This is a mount for the flexible-filament remix of the Leapfrog creatr extruder by eliscott02. I remixed it for printing flexible filaments on a reprappro mendel tricolor with a j-head hotend.
This extruder prints filaflex (84A) pretty well, which is supposedly 1 shore softer than ninjaflex (85A). I print filaflex at 240 dC at 40mm/s, 125% extrusion. I set Esteps/mm to 96 in firmware. I have occasional inconsistencies in extrusion, I actually notice a decrease in printability at a lower speed,