I would just attempt it all and see where you get stuck. But one step at the time with total focus on that one step. I've done a lot of instrument repair over the years and the first one of a new class is always the hardest. So rather than to take the whole thing to pieces I'd fix just one aspect of it, reassemble and enjoy the improvement. Then fix the next thing. It's much more work than stripping the whole thing down but it keeps the gaps in your understanding small enough that you won't end up with a pile of parts rather than an instrument.

I've been trying to remember the name of a particular instrument for you for the last 24 hours but so far no success, if I recall it I will post it here.