Nice job Rich, I've had tools in my hands, working on trucks, cars, bikes, & now watches ( as a hobby ) for over 50 years. Your tutorial is helpful, informitive, & entertaining, thanks for sharing!
I prefer 1.3mm drill the lug holes. Mainly bc it’s damn near impossible to find a 1.25mm bit in the US without ordering and I’m not too patient so I ran to the near harbor freight and got a set of titanium bits for like $3 bucks.
Titanium runs through those lug holes like butter. Great tip about bleaching the insert! I always run a high grit sand paper over the insert to get through the enamel or whatever they coat it with. Then it does bleach but now there’s scratches all over the insert.