In reply to:

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> I still have to teach them how to use it every time they ride with me.

I solved that particular problem with having a single half page menu (laminated) of common commands. This way, they can read the quick list and figure it out for themselves. I was able to use a bit from the remote button section of the FAQ...

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Are you sharing this reference card? I've been meaning to make one, so if I can do it without having to put in any effort...