I moved to the far corner next to the lever you pull to make the ledges appear and saved. From there, yes, it's a matter of practise. I didn't think I'd ever make it. *spoiler* On the 2nd disappearing ledge there's a pressure plate. Make sure to step on it and then just jump.
"That's not failure it's re-defined objectives" The Penguins of Madagascar
"You are confusing cowardice with tactical retreat" Masuka, Dexter
Fine: This is the word women use to end an argument when they are right and you need to shut up