LR BaggsiBeam Active System with Volume Control for Steel String Guitar

Can anyone else confirm the "1/2 inch Step Drill Bit" is the best drill bit for this project?

Any tips for self install? Can anyone refer me to a jig for placement? What kind of drill bit do I need?

I built a tele shaped semi hollow hybred guitar with standard acoustic bridge. Its hollow all around the underside of the bridge. Would this work?

Can this be used in a 12 string guitar?