moving the rotating shelves on 500/750

for the record, Stuart told me how to do this. That was an ordeal!! I don't have the gumption to post the details at the moment, but here's his overview (I can give helpful details offline)

There are two set screws on the inside of the hubs of the rotisserie arms, it takes a ¼" allen key to loosen them on both. Loosen those screws and light tap the hub with a hammer to release the taper lock. This will free the hub so it can be moved. I think you can do this without getting inside the unit.

Mine is the same way.