Thanks! That's helpful information, because that's not what I'm experiencing. All my internet research is pointing towards low pressure from the PS pump. But the Hydroboost is the first thing after the PS pump, then on to the PS gear box and hydroassist ram....and the power steering seems to be working great. So the pressure is passing through the hydroboost fine, so maybe something isn't functioning internally in the hydroboost. I'll do some more internet research and find some things I can test.
Nothing like solving one problem only to find another! But I guess that's half the fun.