rcwaz,
It sounds like your leaks were the result of awning mounting screws piercing the skin. Not split seams. Did I understand you correctly?
My old 1983 RV
SEEN HERE leaked water when brand new, where the marker light wiring passed into the motorhome. The water had leaked past those rubber marker light gaskets. I simply unscrewed the marker light from the vehicle, sweezed silicone caulk into the hole, and then mounted the light again. I did that for every marker light and the problem never happened again.
About water dripping from the cab-over onto the windshield. My old 1983 RV had that too, but I simply lived with it. Good luck was on my side with my new Phoenix Cruiser. It's much less an irritant, having only the streaking.....No direct water drops. None of those water bombs on the glass.