Very cool, the covered toggles are nice. I've been debating doing the same thing, have the switches and LED indicators, just need to find time to do it after I get all of the other projects wrapped up.
For the bare spot in the dash, you might could patch it somehow and cover it with one of the raised Donzi emblems available at Donzi direct. Or throw another gauge in there. Or install a missile arming or countermeasures switch. Possibilities are endless...
"Speed's fine, but accuracy is final."
- Bill Jordan
1998 Donzi 21LXR
1971 Boston Whaler 13