wow thats impressive venture, I've though in the past that it would be great to have a tool that analyses the exhaust gasses but this is the first time I have seen anyone reference one in a forum...
so A/F...is this air to Fuel then?
Tell us more about this tool, make / model / etc
I recently tried with my airbox lid jacked up because for obvious reasons I didnt want to drill it, maybe you'd want to do that too if you're running without it now?
I removed the seal and placed 2 off 1mm plastic washers on some slightly longer mounting screws drilled small enough so that they had to be screwed down the thread so they didnt fall off
I gave up in the end because I couldnt seem to be getting anywhere with it...perhaps I needed an A/F gauge...who knows?
anyway the airbox lid unadulterated