I looked earlier at the technobots stuff.

The Battleswitch, even if I had good experiences with 1 in the past, nothing else indicates that those are useable in our machines, I didn't meet a roboteer yet that can say it's a good switch.

The Technobots switch can't take more than 30v, and that seems the cut off for most available switches.

It is perfectly possible to use a lower voltage RCswitch to switch another relay that switches the main relay. But that introduces more points of failure.

In short, every machine that uses a solenoïd to control something needs an RC switch, and as long the voltage isn't higher than 6S, commercialy available stuff will do the job. It's when you go over that 6S it gets tricky.

What Team RCC is searching for is a dependable source that delivers the goods.
For Hannibalito 3,2 it's simple. Just an on/off switch. Throttle up, 36V goes trough, valve activated. Throttle centre or down, valve closed.

Bullfrog. Stick center or down, valve 1 activated. Stick up, valve 2 activated.

Another machine needs a switch that is a bit more tricky. But the one as used in Manta can do the task. Stick neutral, nothing happening. Stick up, solenoid 1 activated, stick down, solenoids 1 and 2 activated.