I know I saw a thread about this somewhere recently, so forgive me if I can't find it right now. I've finally found a use for dual extrusion, but I'm running up against a significant issue already. The main color of my model is black, with some white engraved text near what would be the end of the print job. Both extruders want to be on during the entire print, which is causing little specks of white filament (from the other extruder leaking a bit) in what should be all black parts of the model. Has anyone discovered a fix for this?