Tom...The relay (or relays I don't know)....is provided in the Logisys item you posted the link to..

Would not gene's idea work by using the 2 separate momentary outputs provided in the Logisys...??

1 output wired opposite polarity of the other (to the same motor)....and just engage 1 momentary output at a time...the TM pedal only needs to travel 1 direction at a time for steering control anyway...

Rickie