Heureka! Good things come to those who wait (or check their stepper motors) 
Personally I would advise against using Nema 23 in 3D printers
- To my knowledge, those who tried reverted back
- Not needed / no benefit for regular consumer printers of relatively small size. What do you want to do with the additional torque? Wrap the print head 3 times around the frame in case of a crash? CNC is a different story, there you need the torque
- Higher inertia thus not really fit for the small and quick movements during 3D printing.