GE Dash 9 / AC4400CW Air Cylinder for Athearn Blue Box Kit

I've been putting together and weathering an old Athearn Blue Box Dash 9, and I noticed I was missing the air cylinders (for the air brakes). Using some scale drawings, I created and printed these to fit over the nubs found on the Athearn Blue Box kits. The higher the precision, the better; I printed these at a 0.05 mm layer height.