Giá Đỡ Cuộn Dây Điện Gridfinity

made some changes to an existing holder. made it larger, to fit Fermerry spools and put it on a 1x2 gridfinity base with magnets (6x2mm or 6x3mm will work). 

print in place maybe use support for the magnet holes and grid transistion to get the best result. some spools are tightly wound and are a bit wider then most spools, those will turn a bit more difficult than others.

made two variants, on with a hole and one with a slot for the wire 

also made a shelf to go with skadis universal hook.

spools have 69mm diameter, 28mm width and inner diameter 23.5mm