Extrusion frame slot cover.
Easy snap in and out.
You can use Customizer to choose exact length you need.
You can also extend the cover on one side to cover small gap between the frame and motherboard box as I have in Geeetech A10M (see picture attached)
Print as designed, upside-down on the flat side.
Layer height - 0.2 mm recommended
Infill - 0%
No raft or brim is needed
I printed with PLA
Any comments and suggestions are welcome