I am still betting on relief valve or its setting.
Leaking spools or other locations have to pass a lot of flow before bringing the pressure down.
Leakage at high pressure still loads the engine and you should hear it.
If the engine is not working as hard as it did, the flow and pressure are low.
If the bypass setting in the pump was too low, it still should go to full pressure on low speed in the small stage and have full splitting force. It would just unload sooner in the cycle.
Your cylinder leakage rate sounds normal.
Need a gauge.
Leaking spools or other locations have to pass a lot of flow before bringing the pressure down.
Leakage at high pressure still loads the engine and you should hear it.
If the engine is not working as hard as it did, the flow and pressure are low.
If the bypass setting in the pump was too low, it still should go to full pressure on low speed in the small stage and have full splitting force. It would just unload sooner in the cycle.
Your cylinder leakage rate sounds normal.
Need a gauge.