Works great, very nice and smooth print, bits fit together very well.
Fits my toothbrush with model "3756" on the bottom.
The toothbrush tube tightens and holds the toothbrush in there just at the end of its screw, so that's very good.
No supports, and everything still twists in great. I may have needed to rotate a couple of the models so they're all oriented in the obvious way.