I gave my Vario a long-overdue cleaning today, and after putting it back together, tried fiddling with the calibration using the hex wrench tool. Strangely, I couldn't get the tool to find its socket in the adjustment thru-hole housing. No matter what angle or x-y positioning I tried, it either spun against something flat or angled inwards too deep, once coming into contact with the underside of the spinning burrs and making a hell of a racket.
Is it possible that the adjustment set screw just rattled loose? I use the grinder for pourover, so it was most recently dialed back to give me a wide range of coarser grinds. The burrs were last calibrated just to not touch at 1-A.
I've never taken one apart before. Is that easy/recommended?