Checked out page 16 of that link. If I loosen the knob, the elevation wheel wobbles. The knob was tight. If I take the knob off, the wheel falls off. I’m calling tech support in the morning. If I take it apart, I may be able to find a way to shim the elevation shaft so the knob will tighten it. The bevel wheel is the same way.

Where are the band-aids?---Pro Libertate!