[bestgenman]

TJ,  pretty much all the sets used the GTSS (ground to start/stop) three wire scheme across most manufacturers.  Recently (year unknown to me) with the advent of low battery voltage autostart,  found in many charger/inverters, there have been circuits to allow a two wire start/stop operation.  Two wire SS can be achieved in a three wire system with the use of time delay relays.  This scheme closes the start lead for a few seconds then releases.  The same goes for the stop.  The Martin Diesel sets are implementing a microprocessor controller that allows two wire, for the autostart, and three wire for the multiple switches.  I can't offer anything for the Power Tech sets however,  they have been using controllers capable of the same operation.

Will you be around Mid-Ohio this year?