I'm most of the way through the prints and have started assembly.  I'm a little new to 3D printing and CNC, so excuse me ignorance if I missed something.  I'm looking for the T14 Nut holder.  I see T8 for everything and a few T8_to_T14 bits but it seems incomplete with regards to everything needed for the actual T14/NEMA23 install.

I didnt made the T14 holder yet, did you bought a T14 screw ?

For what it's worth, I ordered T12x8 (8mm pitch).  I figure with the Nema23 it should be OK?  Do you have any thoughts on this?

it's should be okay yes !