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They really should develop some valves for it though, as single circuit hydraulics are rather limited, but neat nonetheless. I'm sure someone will figure out little valves using 3D printing or something though (there are already pneumatic tanks you could use for hydraulics as the return reservoir). Also, large motors definately seem necessary and if you were using it in a GBC or other stationary application, or if you just don't care about having an umbilical, you should use a power supply if you plan on running it for any decent length of time.
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