I believe I posted this exact thing earlier in the thread...
I sold a handgun to a Washington resident and I am an Oregon resident. I drove and hand delivered the handgun to an FFL in Washington for the Wa resident to pick up later. Of course, I'm no dummy and I already had the cash (cleared check) in hand.
I also sold a rifle to a Washington resident. This, being a long arm, was transferred to the new owner at an FFL in Oregon.
I did see your earlier post and read it (thanks for posting that), but being the ultra cautious guy I am when it comes to these matters, I wanted to ask again to be really sure. No firearm is worth a federal offense.