This is a remake of some wonderful design work over at Inventables https://www.inventables.com/projects/mwp-y-axis-braces and https://www.inventables.com/projects/mwp-y-axis-belt-dust-guards There wasn’t any source files so modification wasn’t very easy. So I remade it from scratch and narrowed down the materials needed.
Be sure to reference Robert Rieke work in the links above for more detailed instructions since this is really just a variant of his work and all credit should go to him.
I also posted these files over on thingiverse http://www.thingiverse.com/thing:1844698
If you have a large enough laser cutter you can cut these as one piece. I changed the holes to fit M3 hardware and slotted them so you can move the side rails up/down and flush to the wasteboard.
I also made a front/rear variant that you can use the same braces to hold them in place.
.25" 6061 aluminum sheet to mill out 9 or 12 pieces of the stiffeners.
.125" acrylic sheet to mill or laser cut out the side plates and front/rear plate.
54 M3-10mm Bolts
36 M3 Drop-in extrusion nuts 2020 size
18 M3 regular nuts