It's hard finding time to do some testing right now... but I made a trip out tonight.
Here's a teaser.
It might be hard from the picture to tell but look at the luft in the yarn near the center of the window. The top of the window has a tighter yarn and the yarn near the C-pillar is curled outward stuck in a vortex.
I have video I might edit tonight/tomorrow. I want my friend to see the video first but he's presenting a paper in Dallas so you guys might get a sneak peak.
-Ryan