Experimenting with how to reduce friction and turbulence in getting fresh air to the back passengers and simplifying the connection to the naca ducts. The current plan is to have just one Y split from the naca that feeds both the front dash and rear side wall channels that will have eyeball vents for on/off. I need to confirm with tech support on placement but looking to install the rear guiding channels a little further back and use a new 45 piece in the guiding channel to route air to the back. Reducing the number of S turns in the ducting is part of the goal. This will take some more experimentation and will get finalized later in the build.