Three Chums

Spoiler: Trick List

- auto pilot (tap and move slider to redirect B)
- low ceiling (B acts strangely with a low ceiling and may travel over blocks that B can't normally do)
- maybe cancel tap due to low ceiling (tap some place on the level where B can't go to stop the move)

Spoiler: Video Solution

Fun level. My start was different and shorter. I think your longer start is perhaps to ensure a perfectly upright P but i managed that without any help from B.

I skip your hard previous level
Sorry
Any way nice simple logic
My first win (B drop the ball)
by auto pilot and cancel tap used slider. B landed near the lift and got the ball

My first part was quite simpler & essier & our second part was almost the same. Thanks @Meko Guy