Well, it was a good day to work in the man cave so I clamped the G19 in a vice, put the Glock bit in the Dremel and installed the NY1 spring/Glock "-" (3.5) connector in it. It was a rough 7 minute job.
I kind of like it so far, but haven't actually fired the combo yet. Someday I might carry this thing but finding holsters for Glocks is so difficult! Nobody makes them!