Use 3 valves and a t splitter, not sure about the cylinder bore or pump someone else will though.
Vario m13/1 hydraulic kit
http://www.vario-helicopter.biz/gb/p...ucts_id=100428
Some aluminium plates to mount the hydraulics
£13 filters you can get for £2
brushless outrunner you can get from hobby king for $30
longshaft pump 169euro you can get this as a complete belt drive for 390ish euro i think from fumotec but the flow will be to much for a small model i think
the valves you can get from fumotec also mine cost £327 for 4
hydraulic tank is an rc car fuel tank you could pick 1 up off ebay cheap
www.fumotec.de
here is the cylinders from vario
http://www.vario-helicopter.biz/gb/p...ucts_id=100294
lot of money for cylinder that are to big for your model, once you find out what size you need just pick up some cheap pneumatic cylinders from ebay4