Moidules - X Customizer Remix

I like this project and people have asked for a customizer version. Since the creator mentioned he has no experience using openSCAD or customizer (neither do i), I thought I'd help out by either making all the parts or at least making one example the creator can run with to make the remaining parts. Either way, I found this little exercise fun since I;m a programmer by trade.

The only issue I'm having is that the M does not seem to show up in customizer nor when creating a custom stl. BUT it does appear in OpenSCAD where I wrote the code. So i have no clue why its not working in customizer, if anyone has an answer to that, I'll apply the fix and reupload.

Side note, I added screw holes to the X part, if you put the size of zero, it will not be added to the part.