MiniMoog Model D / Voyager - 3x most used panel feautures

Hey friends,

i’m designing somethin for the minimoog Model D/voyager mashines. i would love to hear what are the most used 3x features on the panel over years… beside the ON/OFF switch :unamused:

If u have the opportunity to mark the features on the pic below, i would highly appreciate.
Thanks in advance!
Mark.jpg