Many moons ago, I upgraded an R1+ to the E3Dv6 hot end. A pretty straight-forward project with a successful result. I have too much 2.85 mm to ditch the one printer that uses it, but I'd like to have an affordable direct-drive extruder that uses that size of filament. My searches have been fruitless in finding anyone who has converted an R1+ to use the larger filament. It seems that with all the carriage print options and drive mechanism options and E3Dv6 hot ends of that size, one could feed 2.85 mm filament in this machine. Has anyone seen such a project on the 'net?