How did you mount the controller. Now that I don't have in dash speakers I am ready to mount mine.Robert, just found this plus there's supposed to be 100 available at the Concourse forum. $80 is about right in my opinion.
I've installed 3 of'em and won't be without. I have one new and one used setting on the shelf and plan to keep both for future use.
If I was doing it from scratch, I think I'd try the newer electronic Rosta unit. Pricey but much smaller.