Plastic Tube Propagation Mount

I'm propagating a few plant cuttings. The test tubes to hand are 17mm with a screw on lid. I saw a few great ideas for much wider tubes, so have used them for inspiration.

Modelled via freecad - (realthunder fork) designed to accommodate 2 off 6mm x 3mm round magnets (removable) or a single 3mm or 3.5mm countersink screw.

Printed in ABS+, easy 30 minute print.