Thanks for the memory bump. Yes, it was the tool kit that needed to be accessed with an allen wrench.
I can count on one hand how many Mystics I have seen in the wild since they were new. I wonder what total production was...
Pastor, Church of the Horizontally Opposed Air Cooled Twin
'66 BMW R60/2, '83 BMW R100RS,
'81 BMW R100RS "Das Beast", '77 Honda XL125