Interesting idea...when you take it further.

I wonder if is possible to make this *really* easy to 'change' lenses.

Take a standard clear or smoke lens, embed 4 tiny magnets into it, within the area normally visible when mounted behind the fascia, but obviously not obscuring the VFD itself, or the IR transceivers.

Now mill a color lens so that it sits nicely in front of and flush against the current lens, and can be inserted from the front. There is enough depth in the fasica that this should be possible. It would take a mill to get the edges angled correctly to account for the fasica's bevelling.

The issue here would be to make part of the new color lens ferrous somehow so that it is held by the magnets.

The other thing to think about with any magnetic scheme is how strong to make the magnets. Ideally, to allow for bumps in the road and the fact that we'd want to make the magnet area as small as possible, we'd want to use tiny rare-metal magnets....but I don't know know whether that's a very good idea due to the proximity to the hard drives.