Multiple flexshaft motors on one pedal

Hello Orchidians

Most of the setters end up having more than one flexshaft motors.
Working in tight quarters it is frustrating to struggle with 2 or 3
foot pedals specially if they all look alike.

The question is directed to individuals who have built their own set
up to work with 2 or 3 motors with one pedal. For an electrician I
know this can be done easily with switches and junction boxes. I
would like you to share your experience in building one for a friend
of mine.

There are 2 units out there commercially available for about $150 to
$200. The aim is to build your own.

Regards,

Kenneth Singh
karat46@aol.com