I am a software engineer of 20yrs.... your comment on Excel is interesting, given that the files are binary did you do some conversion to csv or something... and how did you load from the eprom?
My program reads the binary file and extracts the real numbers.. on a purely technical note what did you do?
As for engine tuning, I have a lot of experience in racing bikes over the years and some car stuff but am being cautious on engines like these. Fundamentally the Webber Marellis are simpler than most but it costs a lot to fix a mistake.
I am intending to use O2 sensors and other sensors to help me identify engine status and problems before they become serious. I am thinking that for engine control I will leverage what others have done rather than reinvent the wheel. Thus my work will be to fine tune the engine. I am intending to use all of my own software and embedded systems later on though.
I think thats the safest route.