Can you guys Trackstand?

Yeah, sorry, I misunderstood what you were getting at - of course, you're right as long as you take the front hub axle out of the equation by using the brake to lock the front wheel. Then the long contact patch at the front gives you effectively two ground contacts, and because the wheel is turned they make a triangle with the rear contact patch. Once you get your centre of gravity over any point within that triangle, you can stand still forever without having to make further adjustments.

Yep, you've explained it better than me but probably around 40 or 50 psi is about perfect. This way staying stationary is much easier. You also don't need to revert to standing out of the saddle as your centre of gravity is slightly lower due to the greater contact patch and being closer to the road.