Can you beat the campaign without hydraulics?

So inspired by levels like Only One and some of the Workshop levels I have tried to play through the campaign using as few hydraulic pistons as possible. Kinda against the spirit of Only One it turned out that almost all levels can be beaten without any hydraulics. (While staying under budget, the bridge is allowed to break)



Currently I know how to beat all levels except [80s Fun Land: Edge Hugger] and [Zen Gardens: Drawn In] without hydraulic pistons. For both of those I need 1, although the Edge Hugger bridge abuses that ships don't destroy Steel/Cables.



So if anyone can improve on those I'd love to hear about it and/or see the solutions.



If you want to try the no hydraulic challenge in other levels yourself, some of the more interesting/difficult levels I found were these:

- [Snow Drift: Elevation]

- [Ancient Ruins: 20m Fork Jump]

- [80s Fun Land: Double Double]

- [80s Fun Land: 20m Reverse Criss Cross]

- [Zen Gardens: Two by Two]

- [Zen Gardens: Dangle Drop]

- [Zen Gardens: Six Pack]



Good Luck :D