Ever thought of rerouting air through a SCAT inside the engine compartiment? One would think that's perhaps not easier, but far more estethic. And the connection plenum/SCAT is easier to do as well, I guess.
Curious what you come up with. I' m still building, but it is somewhere on my list. First want to experience how passengers feel ;-))
build & sold project Kitfox IV
Project bought & building RV12 #120742
Donation 2020 paid