corner tube clamp
thingiverse
A great design as seen by Benjamin (https://www.thingiverse.com/thing:37641) tube clamps allow to hold tubes, rods or bars at predefined angles. The original design has the tubes overlap each other keeping the footprint small. The alternative is a corner clamp where all the tubes virtually meet in one point. I've made a version for the platonic solids tetrahedron and cube or rather cuboid. Tubes in this case are 10mm diameter beechwood dowel rods (~2€ /m) and M4x15 bolts with nuts.
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