Is this possible?

I've been sitting on a GR-1SF kit and a pair of TV Jones Classics for at least a couple years now and starting to think about a summertime build. I'd like to do something somewhat unique and I've been interested in a 12-string for quite some time now. is it possible to plug and redrill the tuner holes on the GR-1SF headstock and fit 12 tuners? Are there particular considerations/potential pitfalls I need to think about in my planning (nut? bridge update? size/placement of tuners? issues with the "bigsby", etc?).

Thank for any insights/thoughts/experiences you can share.