Rack for 4 test tubes

thingiverse

I modified it to sit on a countertop instead of hanging from the tank's side. I also thickened the part with holes so it would print without supports, as attempting to do so previously resulted in the thin edge piece collapsing mid-print. The new version was printed at 2 outer layers, .25 resolution, and 30mm/sec without infill or supports. For optimal results, I suggest printing this model in white to allow for accurate color readings with tubes inserted into the rack.