Old stuff rising back to the surface, that's great! Spoiler I just did it by pulling up the first draggable before B arrived under it...
Reviewing unfinished levels I finally solved this one. Great one with really original mechanism. It is easy when you know the solution, but until then... Thanks!
Gulp! After reading spoilers I think I solved in a different way... Spoiler Autopilot getting under the first draggable... I didn't used any hidden draggable.
