@janbeta that's looking awesome, my first thought was that the F keys in a translucent colour that matched the power LED would be spectacular.

A dark translucent green set on yours, maybe? Or a red F-key set with a red LED? I hope I can get myself a set like this one day for one of mine, I'd love to mess around with an era-appropriate backlighting control or something.

Changing keyboard background with a POKE to match the border colour or something would please me immensely!