Hello Matt, The secret to getting the air out of the Leimbach hydraulic pump is to run it at around 4 or 5 volts until all of the air is out of the system. When the pump is run at 7.2 or 12 volts the rpm of the pump is around 6000, this causes the trapped air to foam and you can not get it out. I tend to agree with you that the current ECU will not work. Andreaus informned me at Superman that the english instructions on programing the ECU are not correct Even if we have the proper instructions I would bet my last buck that no two of the pumps operate the same.The operating theory behind the ECU is when a cylinder reaches the end of its stroke and load the pump motor increases, causing the ECU to see increased amperage draw from the pump. The problem is unless you know what that value is and are able to set the relief valve in the pump properly, the ECU will never work. I asked Bob Wilcox to see if he could get the specs from Markus Zipperer. I know Bob is very busy so maybe remind him about it and we could put our heads together to make the ECU work.

Don DeSandre