Had the three bag on my 02 Ultra. Very useful bag, but rubbed the windshield. I masked a line across the windshield about three inches above the bottom - used sandpaper to rough up the windshield - spray painted with flat black (two coats). Looked great, but after a couple of years the bag rubbed holes in the paint.
I would be afraid that the bags would damage the dash pad.
So far, I have decided to do without the windshield bag on my 08