Low speed seems to operate at as much pressure as high after it freaks out. So after high takes its split second nose dive from 19 to around 4 or 5... I simply kick it to low... the noise stops (which seems to come from the impeller area) and low speed is quiet like it should be. Once it is done running for the day I will let it sit... High seems fin on a cold start...

Kick it on and video what it is doing... a picture is worth a thousand words but youtube is priceless.....