Right, it's a 35MM bit for the door side (1 3/8"). I was actually talking about the plate side inside the cabinet. I need the plate to be recessed into the end panel a bit so that I can get a full overlay . It would probably be a 2" or so forstner for that; won't know until I play with it.

The downside is the footprint of the plate is actually sort of a square cross (like the Red Cross). So a square cross fitting inside a circle... there would definitely be some gappage. Wouldn't be visible with the cabinet open, since the door stiles would cover it. Ahh, compromises...

I don't think I could use my router even if I wanted to. I suspect the base plate is too big and the floor and ceiling of the unit would get in the way.