Bentley,
I did that cook about 4 /5 years ago, but I never wrote a story about it. Why I tied it up I have no idea. I have no recollection of the cook, outside of the file name and those pictures that are in. I might have just trussed it to hold the parchment paper on. It could very well have been a test to see what the parchment paper would do. .....? If you had the right kind of stapler, that could do a nice job of sealing up the parchment by folding and making stapled seams. Obviously, the smoke does penetrate the parchment as evidenced by the smoke ring. Can't believe the ring would develop while the sauce was being set. You inclination about boneless and stuffed could be right on the money looking at that last picture of the plate with the pork.