This is what I came up with. Using a arcade joystick, I only had single pole switches and no way to isolate the two, so I interlocked them.. the run signal back to the R inverter teminal goes through the forward switch Normally closed. When the forward switch makes, it opens up the circuit made from the othe switch circuit Run circuit is made from either switch making across NO contacts.

This joystick has two sets of cherry type switches. I have two inverters to control. SO this turns either set on on the ten foot gantry robot. Speed control is a waa waa pedal (CCW style) that I can step on or let up on.. second inverter is keypad controlled, it is a .68rpm motor so it really is in no hurry.. I was running it at 160hz today.

Maybe it'll come in handy for someone else. I had to draw it out twice. and still had my doubts when I wired it. (not feeling too well today got a headache)

A inverter has isolated control power for it's pushbuttons, speed controls and other controls. DO not mix them with 120 or other sources or you will have bugs.. dry contacts in a relay or switch.