heheh I would have to be selling a whole lot more pictures to justify a D2X. And to be honest, I really don't see the benefit of the D2X over the D200 or D80.
The good news is that I think I may have the problem fixed on the D50. One thing I noticed is that when I was zooming in and out with the Bigma, I could feel the lens rotate in the mount just slightly. It got looser over time and then got to the point where the camera was wigging out by just turning the lens slightly. I tightened up the screws on the lens mount and it is better so far.
I am heading over to the "first Sunday" event at Santa Paula airport today and will give it a good workout to make sure it's okay. If not, I'll be scrambling to get something done in less than 2 weeks.