Sep tube rack
thingiverse
I'm going to make one of these inexpensive conical tube racks for my lab. I'll print the top with the legs up, naturally, and then print the bottom with the holes facing upwards. Next, I'll use a little CA (super glue) to join the upper and lower portions together. This will cost me much less than the $35 commercially available racks that are out there right now.
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