Summary

13x50 mL Tubes Lab Rack (13x15 mL Tubes and 16xEppi tubes) with an hexagon shape for max capacity and organisation of the work station.
The racks interlock to save space and are vertically stackable (using the part D accessory).

Like and share your prints, go crazy with the colors and let me see how you organise your bench!

Notes: I print the pillars (C and D) vertically with a brim, it's possible that to fit well you may need to file the inserts a little bit.
Update: Part C was breaking apart because of poor layer adhesion, alternatives are printing it horizontally with supports, or print part C hexagonal, also horizontally and with supports.