A recent thread mentioned Diamond Gunsmithing as a specialist for working on Floozies.
I had some corrospondence with them (they answered my inquiries quickly and courteously) about having some work done to my 2-1/2" chambered Flues 20ga. and it came out that, quote,
"I won't let the gun leave my shop with short chambers. Liability reasons. To lengthen chambers is $30.00/barrel. I'll test fire with 2 3/4" light field loads." I don't want mine changed.
Just a heads up if you are considering having work done, it seems chamber lengthening is mandatory. Hate to see someone's original gun be altered unintentionally.