Yes, pneumatics is super-difficult, and I have no idea where to get the parts, but, if you pull it off, it is AWESOME... I mean, look at last year's "Anticide", it was super amazing. It was worth it just for the triple-back-flips
Last year's AWS55 arena was built with some parts of very high wall, maybe 30cm high (I might have this wrong) and I *think* that Anticide managed to flip one opponent over the high part of the wall. I might be remembering this wrong.