The only block you need that's outside the puzzle is the one from A. 1 just mess around for a bit and see if you get it.
ive tried that
Keep trying.
if you get a block from A1 you can only push it in front of the ladder witch I think is useless or you can unlock the fast travel and push the block forward when you get off of the conveyer but then I cant figure it out
Don't forget the other blocks in the level.
ima come back to that later just trying to get passed A.7 is hard