This is important. I had a friend who died in his Lancair because the carb heat door broke off and lodged in the carburetor throat. The design was very similar to what I see in the photos. His death prompted me to totally re-design the airbox on my Lancair so the carb hear flapper was balanced and rocked back and forth like a teeter-totter. Ram air comes in the front and heated air comes in from the back.
(2019 dues paid)