I love looking under the hood in equipment and seeing what is printed on the circuit boards. Here are some of the highlights on the Elektron Octatrack which I recently serviced.
Below is an optical crossfader. Love the digital codes encoded here!
"Its a Boo..." The IC was mounted so flush that I couldn't see the rest of the word! Love it!
Loop user interface. Classic!
Here's the entire CPU board, below the entire UI board.
And finally, the faceplate with my daughter giving us an inside perspective!