Thanks to everyone who responded. Your info helped me a great deal. It is interesting the different responses of people using the same head. Myself, Ian, and Lorinda all seem to experience a very stiff tilt, while several others say their works like a charm. Fascinating!

Anyway, I opened the sucker up and everything seems to be functioning. The counter balance spring is just very tight. I wish it was changable (I suppose anything's changeable, when it comes right down to it - just not easily).

The nut that holds the tilt resistance knob on, was not overly tight - although now I can't get it to stay on. I'm running to Lowe's to get one with a nylon locking center. I must have had Locktite on it or some such, although I didn't notice any sign of it when I removed it.

The good news is, once I tore it all apart, (thanks Don) poked around and put it all back, the tilt was a bit looser and the wobble was gone. Not sure what I did, but, "Yay me!" It's still a bit stiff for my tastes, so I'm just going to intentionally add weight to the camera when I use it (an ankle weight strapped to the accessory plate as a counterbalance to the heavy front helps) and probably sell it soon and try another head.

Cheers!