here is my take on the Damper.
The body is aluminum and made a plexiglass cover. I made 1 unit.
I think Ill try plastic next time its quite noisy. Also, instead of bearings used 1/4 nuts. pretty straight forward. Also I used 8 holes instead of 9
I got at least 10ipm more instantly for about 25ipm, I thing I need to loosen my ways, gibs or something my X Axis is horrible so bad in fact it only wants to go one direction no matter what way I tell it to go.
My Config is
Xylotex 4 axis controller
and 269oz steppers