Thanks for all the answers. I thought maybe a heater hose at the heater core was leaking, but running the DP and the heater going full blast everything was dry near all the hoses. I even followed the heater hoses all the way back to the water pump and no leaks.
Pulled the aluminum cover off around the radiator to see in there with a powerful light and no leaks anywhere. Raised the engine cover inside and checked every coolant line and nothing leaking with it running. Guess we will monitor it and stop every so often and check it. Drove it at least 1 1/2 hours today and ran good temp wise and no fluid loss. We will see I guess.