George, thanks for the link to that thread on the top hat separator. I think that should suit my purposes nicely. Heck of a well documented project as well.
I was not planning to use a baffle, just the separator at this time.
The top hat separator will allow me to use the metal can without worrying about the corrugated sides slowing the air movement and make it a lot easier to empty the can. Now if we can put in a window to see when the can is getting full it would be perfect eh? I just have to do some measuring to see how much clearance I would have for the can using this method. If need be I can just extend the frame height with some dowels as others have done.