Hey Texas!!

I will Jump in an answer a few of your questions but I know the others will add to the chorus..

Not familiar with the 8 gen 2 - I have an NX8 that I just checked but I haven't used that radio for my "gas conversion" stuff yet. Many ways to skin this cat but my way is a separate channel (6/7/8 etc) that uses the throttle stick as its input. Then the output from this channel is "curved" to meet the needs of the fuel adjustment output. The Spectrum 8's don't seem to have a way to do this so you will have to use a "mix" (throttle to mixture channel) and set the curve of the Mix. You will be limited to 7 points it seems.

I will have to look into the solenoid part numbers as I can't recall the best one or the one currently available.

I'm currently working through a "much simplified" solution to the "glow to gas" situation - info in the last few posts - It is simply a manifold "air bleed" that is able to lean the off idle to mid range part of the curve that is usually troublesome when trying to get a glow carb to work on gas. It eliminates the Microprocessor and the solenoid and replaces it with a simple air control valve (servo) that plugs directly into the receiver. I have had great success but still in the testing stage. The valve can be reliably 3D printed as the control medium is air...

I hope this get you a few answers - will look up and confirm a few of the answers..

The housings were available from Bert (he was recently out but not sure of the status) but I'm working on a CNC'd solution here too. Just need a but more time to perfect the file to get a good fit for the solenoid. I have tried a printed version but have really struggled to get a unit to seal well and print reliably. I have given up and moved to a machined version.

I have only built with the Xiao version.