This project was designed to be used with the MWP Y-Axis Braces project (Link), which uses 1/8" aluminum braces to stiffen the Y-axis, and includes all the hardware necessary for both projects.
You will not need to order the hardware for this project if you intend to do the braces as well.
If you decide not to make the braces, do the following:
1. Order the hardware listed for this project.
2. Replace the large holes (~0.500") with smaller holes (~0.200"), keeping them centered in the same location as the large holes.
Evann made a great addition to this project, you should consider checking it out: https://www.inventables.com/projects/remake-minor-fixes-of-mwp-dust-guards
Since you are cutting acrylic, you will want a VERY flat wasteboard. Either flatten the wasteboard, or do like me and cut a .050" deep pocket slightly larger than the workpiece in a secondary wasteboard.
DO NOT ATTEMPT TO CUT ACRYLIC WITHOUT ENSURING YOUR MACHINE IS PROPERLY DIALED IN!
Using proper feeds and speeds, cut the dust guardsout of the acrylic mirror. Ensure the acrylic is properly clamped to the wasteboard, especially if you are using an upcut endmill.
Using 150 or 220 grit sandpaper, sand the top edges of the dust guards enough to remove the sharp edges left from the milling process.
If using pre-assembly t-slot nuts, remove one makerslide end plate on one Y-axis makerslide and insert 6 t-slot nuts into each slot on the inside of the makerslide.
If using post-assembly t-slot nuts, insert 6 t-slot nuts into each slot on the inside of the Y rails.
If using the Y-axis braces (Link), use washers and 12mm bolts to hold the dust guard in place through the bottom holes.
If not using the Y-axis braces, use washers and 10mm bolts to hold the dust guard in place through the top and bottom holes.
Repeat for the other Y-axis makerslide.