by dgs5101, published
hold strips of 8 or fewer small tubes and 2 large tubes
i took this design from a pre made attachment that is made of a material very similar to the strength and properties of PLA. As far as thickness goes i took very similar dimensions on the parts of the model that matter. I altered hole sizes and added the slots for the two larger tube for certain needs in an anthropology lab. and this model has been printed and tested and is balanced perfectly and attains the correct speed.
print then drill out holes, use an m3 to screw on to centrifuge base
if it sits too high on the base and does not allow base to spin. just drill the base hole on the bottom deeper and it will sit lower giving you more clearance. I left a good amount of thickness to adapt to different base heights