FreeRepRap Prusa I3 EMotionTech Support a Cable Channel, fan support with micrometer type tesla and adjustable Stop end ZThingiverse
FreeFlashForge Creator/Pro/X/Dreamer Extruder plastic. Works with Flex Filament. Also works with the Monoprice 3d printer and MicroCenter's PowerSpec. Now compatible with CTC with new version.Thingiverse