I did notice that the outer case doesn't fit very nicely on the diffuser cover. The screws obviously line up, but in between some screws the cover is "bunched up" causing it to lift away from the diffuser cover. I am sure the O-ring is "trying", but if the cover isn't a nice fit, then it is a lost cause.

A friend of mine looked at the outer case as well as the exhaust cone, and he mentioned to me that he thought they were water formed or something like that. For example, I think I am correct in saying that Wren Turbines turn their outer cases down from solid stock. I am sure this makes for a perfect fit. To bad the same isn't true for the JJ's

Brandon