I was working on building the Wilson II kit this weekend. I found that most of the printed parts needed a lot of cleanup. Even with heavy sanding of the z-motor mounts, the extrusions still were very tight. I used a rubber mallet to tap the left z-motor mount from the bottom up as the instructed top down was not working. After succeeding with the left mount, I tried the same with the right.
This was the result:
I’m sure I could have spent more time sanding out the inside of the mounts until the extrusions slide freely. What can I say, I’m impatient.