Quote Originally Posted by BLKKROW View Post
I actually have both a 12" I3V and a 12" Pegasus, both with stock machine screws.

I have found them to print at the same quality except for the Z banding. I am having some banding issues with the Pegasus. But I figure those will be resolved with a little more tinkering.

After spending a lot of time on my I3V and getting it squared away, it is a solid machine.
Check that the bottoms of the Z screws are flat and file them flat if they're not. The axes are always a little misaligned, and when the non-flat cut surface rotates with the motor shaft, it rises and falls, causing Z banding. If you file the screw ends flat and drop a BB in each tube or coupler, this goes away completely.