CAI 302 repair advise needed

The adjustment knob on the lower left of my 302 came loose today. It
was still attached to the metal rod that goes into the instrument and
it appears that a set-screw came loose from the far end of the rod.
Has anyone had this same failure?

Does you know if I can easily repair this or does it require breaking
some quality / calibration seal to get inside the case? I don't want
to take my panel apart thinking I can fix it before I fly Monday, if I
really should plan on sending it back.