I had just changed over my Air 2 to be Bowden (I gained Z room from 90mm to 134mm), and I found that the M4 screw heads were getting caught on the hot end wires coming from the x-carriage. So I used Mecano's drawings to re-create the squad brackets, except I inset the allen heads, and cut chamfers into the edges of the squads.

Now, I can have the x-carriage move back and forth without wires getting caught on the squads or the screws.

I used OpenSCAD.