Looking at Pegasus 12

[BLKKROW]

What did you have to print in order for this to work?

I was looking at these and thought they would be a good fit.

https://www.amazon.com/OpenBuilds-An...MZSX0SBA5AS881

Also, how did you decide on the 8mm ACME rod instead of a M6 or similar? Like this one...
https://www.amazon.com/dp/B00I5V4RVO...I3IK93R4AR8RBF

I had to print the mount for the 8mm nut here is an example: ttp://imgur.com/a/WjSmz . I also printed a mount for a ball bearing to support the top of Acme Threaded rod.

I chose the 8mm Acme Threaded rod due to its common use in 3D printing. Using this and the A4988 driver I also get a nice 400 steps per mm.

[tsteever]

Anything special or specific about the collar on the bottom?

Do you have links to the files you printed?