Work to a Plan

Spoiler: Video Solution

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looks fun...

That was a struggle. I hadn’t realised at first that the bot that pushes the ball that runs along the rail has to return. So a major change of plans. Lots of falling off and restarts. It was a relief to realise that after the stack collapse that it was a simple but long walk to the winblock.
Judt seen the video and realised the last sentence won’t make any sense as different gameplay to video. I had B ontop of P with Z at bottom of big stack so after unfreezing collapse B stayed on P and walked to win.

P is the last bot to make complete 3 bot tower. But I struggle with that.very difficult to put P on jump line. P always fell

Nice one

Very satisfying clean logic level ... wirh many solutiins .Thanks @Meko Guy