I purchased a reel of NinjaFlex 85A filament to tackle this frequent subject on the R2 forums. First off, my R2 printer has the following mods due to my exploring printing with Sainsmart TPU filament: http://community.robo3d.com/index.p...eel-support-mod-for-c2-and-r2-printers.23519/ http://community.robo3d.com/index.php?threads/r2-extruder-mod.23518/ Next, I created a new material profile in Cura for the NinjaFlex 85A filament and set the parameters based on the data sheet from Ninja TeK. And I created a new quality profile using the Low Quality R2 Robo profile with factors adjusted per the filament data sheet. The Octoprint script for the R2 was adjusted for NinjaFlex. A copy has been posted at the end of this project. Gotchas: The next image shows what happens if the nozzle gets clogged. Progress so far. The real test will be in the near future.