Update time
I got 2 of the 3 windows done. I started with the top mesh part on the side panel (where the headphones hang, above the hotswap bays)
I started by removing the steel mesh, then cutting out the plastic honeycomb mesh underneath with my scroll saw.
Then I cut out a piece from the AC Ryan panel I got. It took a lot of sanding and filing to get the window and the cutout nice and smooth.
MMMM nice fit
And a shot of where it goes on the case. I'm going to have a few components and some lighting behind this window, but I'm keeping the details a secret for now
Then I started on the top panel. I removed the steel mesh like on the side panel...
Then cut out the plastic honeycomb with the scroll saw. I had to do a lot more sanding and filing here than on the side panel. The reason for this is due to how Tt made the plastic parts. On the side I was able to install the window from underneath, so it didn't have to be 100%. Here I need to install the window on the top, and it will rest against a few small parts sticking out, so it needed to be perfect.
I used the steel mesh to trace out a rough line for the window panel.
And the window cut roughly.
And a nice fit

This took a LOT of time as the window had to be a lot closer to perfect than the side one did. This window will also have components underneath, and both windows may have some etchings...we'll see on that later on.