I'm a teacher using a Monoprice dual extrusion printer. We are using Makerbot software to run it. It's working pretty well for us. I can't, however, figure out how to change from one filament spool to the other. Monoprice isn't one of the printer types listed in the Makerbot's software menu so perhaps that's the problem. The printer uses both extruders (the raft is printing in one color but the rest of the printing is being done with the other extruder).