FreeFilament guide for MK8 spring loaded aluminium arms for CTC Replicator Flashforge Dual (update: for flex)Thingiverse
FreeX axis carriage (single and dual) replacement for Replicator 1, 2 or clones (lm8suu and lm8uu)Thingiverse
FreeCTC Cooling Radial Fan Duct (Dual Extrusor Version), Makerbot Replicator 1, Flashforge, Duplicator 4Thingiverse