Howdy,
I've had a little more time to read through some of the threads and have a better picture now.
I was wondering your thoughts of a hybrid solution between air bleed and weather condition compensated solenoid.
The short idea is a high speed continuous rotation servo that contains a feedback line would operate a standard remote needle valve to do the air injection handling but
in overview the same idea could be applied to the solenoid solution and perform fuel limiting. This would eliminate the complexities of building a solenoid housing and eliminate
the solenoid driver. The servo would be controlled with the Feather TFT to allow for weather compensation.