Wow! Coug, I need to take a page from your book. I like it!I can see myself trying your method and after the fourth sweater, I'm folding the old way, again.
But, sweaters that are medium quality, I placed them in those vacuum pack plastic for storage and suck the air out of it. For the more expensive ones, I still place them in the vacuum pack plastic but I don't suck the air out.