I'm finding some subtle differences between the Folger R2 manual and the new WIP revision. Looking for a clarification, and also to share a different method for those who might be struggling.
Instructions for the fan mount on the base plate are different:
Folger R2 Manual:
The wires should face the front of the printer.
Make sure the wire comes out on the rear right corner.
[Comment on diagram: "Upside down and wire on this corner"]
There's no depiction of the wire or airflow, therefore no way to know what "upside down" is and there are no markings on the fan indicating airflow. If memory serves, I'm pretty sure the side with the label is 'out' the other side is 'in', but a clarificatino would be helpful.
Regarding the Y axes, IMO, removing the corner brackets is totally NOT the way to go. I found that removing the FT5/FT7 and FT10/FT15 ACM units from the rail sliders, prepping the wire ties, then remounting and tightening was MUCH easier than dismounting the rail from the frame.
Just thought I'd throw in my two cents. Hope this helps.