Remix of @LoboCNC's amazing light switch.
Added more switch clearance for 2 and 3 gang "Decora" paddle-type switches.
While I was at it, I remixed the blade to let me print the knob in wood filament and the blade in silver.
Added remix of single switch blade adapted for separate knob (for @Blackaliss).
The "paddlenubbin" that goes in the middle, switch plates for traditional toggle light switches and all the original files can be found at @LoboCNC's http://www.thingiverse.com/thing:649284
Updated 21/12/2016: Uploaded "paddlenubbin" from original thing to have the full thing in one place.
STL files, as per the original, with built-in supports and without.
Printed most of this in PLA wood fill filament and the mad-sci blade in silver fill ABS for an authentic mad scientific experience.
Sucked the original 3 x paddle plates into Tinkercad, chopped out the middle, cut out the additional clearance and added new supports as required.