Is there a real need for the switch? The gennies have worked for 45
years... They are reliable... They don't go overvoltage and fry your
radios like an alternator can... Yes, they make less volts/current at
idle and low rpm, but you don't have to have everything turned on until
you roll onto the runway for take off... I have gennies still on Fat
Albert the Apache (1957) and looked hard at the alternator issue and
decided I was well off as is...

cheers ... denny