Finally got the Pro set up for my classroom, and I now see the need for these T-nuts. I was literally just helping a student with a design that uses captive nuts, and I made these as a quick example to give him a better idea. And it will also help with clamping.
Prints without supports, with an easy cleanup. If I make a bunch more, I might remove the top “tube” and print on the side. Regular M6 nut fully inserted. I’m sure it’ll hold for even the most psychotic clampers.
I will get the models on Thingiverse if anyone is interested.