So finally had time to play with P38 Valve block again.
To recap, after reconditioning valve block and pump the EAS raised from bump stops to standard height in 20 seconds but the rear end would drop within a few hours once engine off.
Friday I disconnected the lines from the valve block to the rear bags and inflated them via Schroeder valves. Yesterday midday, the rear end was still up. Leaving the Schroeder valves on the rear lines I started the care to rais the front, once up there was a loud expulsion of air from the valve block as air was now being pumped out to the missing rear lines.
I reconnected the lines, started up again, brought the car up to off road height, drove around the block and left it parked overnight.
This morning it was still at full height, starting car the EAS light was on at full height, pump didn't kick in.
It seems to be fine now....what happened?