Anybody ever have issues or warranty replacement issues with air flow on their air dog pumps? I have had a slow leak in my AD165 for the last 4 months. Called air flow and they have sent me a new regulator and new gasket kit to no avail. I asked to replace the pump since it is in warranty and they said that they would sell me a new pump for $465 and give me credit for my old pump of $215. That being that it is a manufacturer warranty issue. Feel like I am being sucker punched on the business end. I bough the pump in October 2015 and have the pump registered under warranty register code.