As @GFJ said, a simple win if headless R not used. However it was harder to get a win involving him, so will give 4* for that.
Is this the intended way or a shortcut? Spoiler: Video If headless is to be used, are tricks involved?
@delator77 - I can do it with auto pilot to get on headless, I can do it by bumping B with a slider onto headless and I can also do it with the two bots side by side on a slider and quick slid to swap B. Did you do it in any of those manners?
@Meko Guy very easy to explain...no need movie...Not sure why(because not always works)when headless pass where B starts,sometimes with one tap B put onto Headless R...Maybe a question of HR legs...if they are a bit higher....
@delator77 - I tried that first and B didn't go. Anyway - the author should pull the level due to the simple shortcut that I posted and fix it. The fix is very easy.
I did it rather like @Meko Guy , but I started by using the 3-block slider to shunt P across so B could climb on.
@Ahnaf ZX - You should tag a member that you are speaking. To do so just use the '@' symbol followed by their name, for example @Meko Guy is my tag.
