About this 3D model

Spool holder For 8 mm threaded rod. Holders are attached with 4 mm bolts/nuts as shown in picture. Guides will fit spools with a inner diameter of 32/39/52 mm and fastened with a spool clamp on each side for easy spool switching. The guiders can if you like be fitted with 608zz bearing after expanding the center hole to 10 mm . It can then be fitted with a printed spool-bushing. Everything else is up to your imagination.