The rolling condition ... also depends on the size of the ball tip. If the rolling condition sets a forced precession that is higher than the free precession, the top will rise... This could last a long time.
I can't figure out which forces exactly could cause a forced precession.
If it is through the rolling resistance of the ball tip, in this case we are talking about the same thing.
Anyway I suspect it is not rolling resistance but something else, because Perry doesn't mention it, and because he instead talks about the tip as a traction wheel, pushing the top forward;
It makes me think to a biker opening the throttle and doing a wheelie; in fact the motion of a biker tending to fall backward applied to a spinning top would make the top rise. It would be perfect.
But the tip is not accelerating the top forward, so it doesn't work in this way.
A bike going at constant speed is not doing a wheelie.
So, if not transational inertia, what else could push the top backwards while the tip is pushing it forward ?
Where is the resistance ?
Could the precession itself pose, in some way, a resistance to the traction tip ?
I may be wrong, but I don't see how. I believe that, if I replace the ball tip in a top, and I use a double diameter ball tip, this larger ball will still let the top free to continue to precess at the angular speed it wants. Nothing prevents the top to walk at a double speed, and make circles of precession twice larger, because of the larger tip;
the angular speed of the precession could be a bit slower because the increased centrifugal force would lower the torque of the precession, then there could be faster rising associated to higher rolling resistance.
It's different from a gyroscope, where exactly the lack of this freedom of motions, (because of the gimbals), makes possible to force a precession by pushing on a gimbal.
But I am not totally sure, because the measurements of the rolling resistance seem too low for rolling resistance to be the only one cause of the rise.
I will perform the test to see whether there is some slipping of the tip during the rise.