I remixed this to mount a chain on the Hotend from my A20.
This is a remix from https://www.thingiverse.com/thing:4738946/files.
You can use the chain from johnniewhiskey https://www.thingiverse.com/thing:2920060
It works perfekt at my A20.
Maybe it works on other Printers with the V4 Extension Board
Printer:
Geeetech A20
Rafts:
Doesn't Matter
Supports:
Yes
Resolution:
0,2
Infill:
20
Filament:
3dJake PLA Post-Printing =============The author remixed this model. Imported from Thingiverse.