Well, it looks like Im in luck, because the first Genesis 2 I opened had a CXA1145M chip in it.

Instead of drilling a hole in the case, I was considering leading the wires out of a hole to an external connector. Is this a good idea? The hole I see is a threaded one in a small metal piece. What is this even for?

Can I find the ECG-85 at Radio Shack?