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Good logic, but a bit repetitive back and forth moves. Thanks!

Haven’t seen the full solution yet but there is a win only using the lowest ball that doesn’t involve any trickery.

Uuhhm,I did it like @ridgerunner and then using the two balls but what is the purpose of the draggable of the tower?

Still no word about the purpose of the tower.
However there is a nice Pillarbot win using all the balls.(my previous wins were with B)

Here it is.

Spoiler: Movie

Uuhhm,watching your movie I noticed that your way is more elaborated than mine...I did almost the same steps like you but with less steps and avoiding the use of the tower draggable!! Thanks for sharing @Master Author

@Master Author ... Having watched the solution, the only point of the tower seems to be freeze P to direct the falling ball but this was never a problem for me. The ball in the middle however fell badly twice for me.
The video does show a hint of my pillarbot win, but i halted P to allow the transfer.