About that YEAH... I never got around to taking a picture of my own, and my friend and I have only been able to find on picture of us (after a billion x_X hate when that happens! lol Actually, give me a moment...)
So I stretch the trim, not the shirt... The problem I ran into was once I sewed the trim on, the collar fell open. Let me show you the picture I have and you would likely be able to figure out where I went wrong.
But thank you for the info, I am looking into getting a serger so I will look for that!