[improbable22]

Sure, hopefully there are many details which we could ignore, like we can ignore what the planets are made of. But from what we know about how nature works, I suspect a lot of little details are going to matter.

Flies are pretty highly optimised, and nature is happy to optimise all the way down to the single-molecule level. In fact there has to be a good reason to do something at the whole-neuron level, as this is vastly more expensive than doing it with a molecular machine. That reason is often speed, as electrical impulses give fast long-distance communication. But if you can do some of the computation with a molecular machine before sending that fast signal, why wouldn't you do this? So I'd bet that the hardware is customised many different ways invisible to this kind of scanning.