Hi Michael,

> you also might try clicking the "Reverse rotation" button,
> that may give you a bit more of the feel of object rotation.

I've tried all options, what I have checked is 'allow rotation tilt' with this everything works as it should for object orientation, zoom ,pan and rotate, all feel good, it's just 'twist' that's missing, but I can still work in this way, I just use a combination of 80% spaceball, 15% mouse, 5% UI.
When you're at SIGGRAPH in the studio see if you can jump on a cad station with a spaceball and have a drive, you'll see what I mean.

Thanks for your time.