incomplete

Gaah!
I can get past the first R, but not the zapper bot. And the 2nd R won't let me use his horizontal slider!
Help!

@trids - Thinking it through logically...

Spoiler: Hint 1

This level contains nothing which you haven't already seen in action.

Spoiler: Hint 2

There's got to be a way to get to one of the critical sliders.

And now, if those weren't enough...

Spoiler: Hint 3

What's the closest you can get to a slider, even if it seems out of reach?

Spoiler: Hint 4

Is there anything which might make you take that last critical, yet seemingly impossible step closer to victory?

Spoiler: Hint 5

You've already played through some levels where there was hidden hanky-panky even when the level looked very open. You've even built an example of how some such hanky-panky would work.

Such cruelty! Ok, let me take a closer look.

Ok, I'm guessing there must be a hidden elevator under the big platform? I just can't find it - or am I chasing a wild goose?

Cos I'm at the point of taking a spanner to that lower R bot for refusing to let me past him!

No hidden elevator.

Spoiler

Instead, a mechanism like limited access, but making B move off the steps onto a draggable.

I suspect it's too unintuitive.