ah ah !! you're curious !!
referring to Joe Mauk's past works on large tops
the top is held straight in a king of "stand"
the rope will be wrapped near the tip despite the torque problem
then the rope goes into a pulley
and is held at 10-12 meter high by the tower
at the end there is a huge counter weight
dropping the counter weight pulls the rope
and eventually the top will spin for over 45 mn
and Joe starts to preach ....
that's about it
jim