Antz,
The locking knob for your leather honing is now called "Locking Knob for Honing Wheel". When it was first introduced

AS AN OPTIONAL ACCESSORY in the early SuperGrind days, it was called the "Quick Change". The standard nut to secure the leather honng wheel was a standard 12mm hex nut, like is standard on the T4 today. Tormek introduced a rubber deburring wheel with abrasive in the rubber. The quickchange was introduced for quick changes.
The quick change also allows rapid removal and reinstallation of the leather honing wheel. I have a spare which I store in a gallon zip lock bag. It would be quite easy to remove the leather honing wheel when you are finished, zip it in the bag, and store it in your house, presumably a more temperate climate. The rubber drive wheel is secured with a separate nut. Be sure the pins rest in the sockets.
Or, you could just air condition the warehouse....

Perhaps other members have warmer storage experience. I would suggest also contacting support.
Ken