18th

Spoiler

Some methods or choice maybe found, including the option of using tricks may also be possible and yet you have the best solution, very good in use of P shifted, GJ!

My gameplay was similar but quite a few differences. I liked the pushing although pillarL often got stuck and jammed the mech. Good finish.

Very complex and obscure level. I won with a trick and couldn't see another way around without it. I tried many other routes all in failure which added to a lot more restarts .
The move at 4:19 - my B missed P every time so that was auto pilot. I attempted the move at 4:19 three times and B never stuck it. I know you mentioned to plan ahead but due to the obscurity that can become hard to do. Trust me - I planned but some times one must test a move and when it's too soon restarting after more than half way is never fun especially when it's many times.
The other minor problem that I had was my L often got stuck at 39 sec in the video as the opening was only one block and L stopped the mechanism. Giving two blocks is always more stable. The interesting part is R never stopped it... The level was very challenging with several obscure routes and sequential game play so well done.

Thank you for playing, @Squid Ward ! Yes, there are a few ways to complete this level, either with or without the use of other tricks. By the way, I like your profile picture!

Thank you for playing, @ridgerunner ! Sorry for the autoslider being jammed due to Pillar bot L. I've used round blocks which are the stone pillars around it and Pillar bot L never stuck in any of my trials while testing.

Thank you for playing, @Meko Guy ! You said you won with a trick - what's the trick? I wasn't able to access to good Internet so can't view the video. I think the move at 4:19 is B trying to mount a moving Pillar bot L. Well, it did needs some precision/timing to tap on Pillar bot L but I don't think it's an autopilot though. So sorry this move troubles you especially it's so close to the end but the good is it didn't force a restart.

@ohmytian - yes - no restart would have been required if all the other game play was right but I didn't win the first time it happened as I wasn't prepared.

Amazing adventure and I had a lot of parts figured out up till about the 4 minute mark, so thanks for the VS to help me along! Enjoyed how much the bots worked together in this level