Hi, best thing to contact Frank directly.
The pump is on his side:
Jung Pumpe 
I run the Komatsu with 3S 5000mAh Lipo.
My Futaba RC-System is not able to mix to chanels as V.
It would be the best to run the pump smoothly just with small speed and only power up if pressure is needed.
But my FX18-1 can´t do so.
So I have to save my money to buy a RC-System which can do so.