The Captive V2

My shortcut has gone and i am stuck . On the 6th draggable i can pick up R with the rail of the rotatable and engage this rail with the rail draggable but i cant get R to step onto the latter.

See, my original plan was just to create these experiment world of planks with various textures and surfaces to see which one will free B, and then I figured why not create a proper level anyway. That last draggable wasn't blocked, since it was originally part of the experiment textures.
Anyway, sorry for the block, because I really want R to walk the sixth plank and not skip it.

Spoiler

Just stumbled upon the solution for the 6th draggable myself because as I've said it wasnt originally meant for R, but for B. Anyway, once you carefully lift R with the rotating lever, quickly pull away the long plank underneath so you can bring the long-toothed draggable close enough to insert into the rotating lever's hole. Once R is on the slider of that long-toothed draggable, pull him away before he gets a chance to walk into the inner arm of the lever, because then he will not go back, and then you'll have to drop him and start over again. It's really a matter of a few very very swift movements and lots of hope that R will stay on his feet.

Oops, sorry I didn't read your comment properly, apparently you're already on the part where R is riding the smaller draggable. I shouldn't have gone in length like that. Haha. Anyway, you're almost there.

Finally got there and certainly was tricky transferring R on that 6th draggable.
The nearest i got to dislodging B was a downward drop on the first draggable but he always quickly shot back up again.

@ridgerunner Great! Well that's B, always back on his feet.
Thanks for playing again, btw.

Spoiler: My way (v1.6.0)