modifying waverly tuners

Gibson Roy Smeck Radio Grande 7 string! in for tuner replacements... Currently has faulty original grovers, wants waverly titanium that I'd have to modify the plate shape to fit---and drill a new lower hole mount to avoid new holes drilled in the headstock ( around the "e" in waverly logo; and new plate hole and old plate hole would intersect by a whisper ). I'd have to remove the cog to mill & install, but the mounting screw head has clearance enough after...

-any reason not to do this besides exposing metal that is not the "titanium" coating?

-any better suggestions?

Client is ok with modifying the tuners but not the guitar...