False Panel Spacers and Retention Screws

I have two computers installed in one case. The case is the Thermaltake Core W200. As you may expect, when there are two computers in one case, cable management suffers because hiding cables from one side displays them on the other. So...the only way I found to get a cleaner install was to purchase sheets of ABS panels in 24"x24"x1/8" and cut them to fit the case. In order to create a false bottom where I could hide the cables I needed spacers to create that void. These spacers are 24mm tall. Th