Kieth, Robert Gendlers guide to HaRGB imaging of nebulae is fantastic and it very quickly sorted out my salmon pink problems! I would strongly recommend having a look at that...
Using the Ha data as the red channel, or blended with the red channel usually works too... If you use Ha as a lum across the entire image you will almost always get the salmon pink result, this is because the black and white Ha Lum simply brightens the red channel... We all know what happens to red paint when you mix some white in to lighten it up do we not?
Keep at it mate, with the amount of data you've captured I will bet my backside that you can produce a real ripper image! all the other variables (guiding, focus, composure, calibration etc) all look spot on... This game is going to come down to the processing!