Hi I have a 3000 psi flatline set as 1100psi that is slowly leaking

-turning psi down will shut off small leak
-turning psi at and above 1100psi will increase small leak
-shooting 1-2 shots makes the pressure drop and take 5-6 sec to climb back up to selected psi and start slow leak again.

what would need to be done ?

-cleaning lubing, change internals or else ?

BTW is it possible to order from AGD a 4500 psi internal kit and upgrade ? I left a message to Dave's attention at AGD last week but haven't receive a answer yet probably busy

anyone have a opinion ?