I am looking to help a guy put a aux hud kit on a Kobelco 907 which is about 25 years old , he wants to run a vibratory compactor and stick pilings in the water for boat hoist , docks and camps , one directional flow is all that is needed , ad the return line would be best placed if returned to the tank so that there will be no back pressure on the attchment when it is stopped , the dealer says there is no aux kit or parts available for it , made some calls to after market kit manufactures such as Hydraulic Curciutries with no luck , someone suggested tying into the travel motor hose and install a valve , the machine is on a barge and walking is very limited so once in postion it would not move much anyway and throwing a switch or valve would be ok , I would almost think I would need two valves , one to divert the flow from the travel to the attachment and one to divert the return to the tank , has anyone done anything like this before and have any input of the best way to acomplish it , any replys would be greatly apprechiated , fishfiles