I have been giving my 3D printed spindle a more rigorous testing by using it as a drop spindle. I rather expected a sudden drop might be detrimental, so although it was a shock when I dropped it on the concrete floor and the head broke off, I was not really surprised.

I used Loctite 454 to reattach the head, which worked very well. I couldn’t find one of the top tines, but it will still function as a supported spindle (much less chance of a distance drop).