FWIW:

I developed flap position selector system for my early 235 because I didn't
like the idea of getting a "go-around" call from the tower and having to
visually check flap position during an extra busy time in the cockpit. With
the simple toggle switch controlling the flaps, stopping at neutral without
looking (or at night) was my main concern.

The device is pretty simple and reasonably easy to fabricate and inherently
incorporates a flap position indicator (which I now find sort of redundant
as the whole idea was not to need looking inside the cockpit to position the
flaps).

If any are interested, I think I can dig up the design sketches - which
should be sufficient to build one. I also designed into the circuit a method
to revert to the manual toggle switch just in case I had a failure (I'm a
nut for redundancy) but haven't needed it since day one (about 700 hours).

Dan Schaefer