Just a little trip down memory lane before my memory is completely gone......
I lived in McCall, Idaho for 18 years. The man who invented the Predator carb lived outside of Donnely, a crossroads just down the road a piece. The guy was an old country machinist, who's name escapes me at this minute, but was a genius ! Shoulda seen some of his prototypes ! ( kinda like my own shop !) I've seen and fondled some of the Predator prototypes, working and non working. I believe this was after he sold the patent. I never used one nor saw one on an engine while in use.