Funssor

Funssor supplies motion hardware and upgrade kits for 3D printers: linear rails, lead screws, machined brackets, fasteners, and kits for self-build Voron and Rat Rig machines as well as consumer printers from Creality, Anycubic, and Elegoo. The shop runs at funssorlab.com under the Hong Kong entity Fensheng Technology, which says it has been trading since 2012.

For the Elegoo Neptune line Funssor offers two MGN12H Z-axis rail conversions — one for the standard frames, one for the Max versions — plus a Z-axis stabilizer rod kit. These are upgrades rather than spare parts: a stiffer axis means less vertical banding on the walls. Funssor mostly assembles kits from sourced components rather than making them, and the quality of the small hardware in those kits varies.