I'd be tempted to start with #3 and then move to #1 if something got my dander up. It's a GP-100, not a Korth or a Manurhin, so it isn't going to be a priceless work of art to begin with (FWIW, one can interchange "S&W" for "GP-100").
For me, the smoothing out and troubleshooting journey WRT the GP-100/SP101 was the important part, not the arrival. I learned some things, gained some confidence and ended up having a bit of fun. Sure, I'd prefer a Gemini job to my own work, but either way is okay.