I decided to update my fretting methods. Normally, I run a dremel through my fret slots to open them up to about .027" to make fret setting easier, but I realize that is not considered to be the "best practice" these days. Even though I added some set to my fret blade, the fret slots got narrow again after cutting about 3 fretboards. I measured the slots in the board for the Gretsch and they are about .025" wide. I think my frets will be tight, especially in the upper fretboard extension area.
I had heard good things about Stew-Mac's fret barber but didn't want to spring for the cost, so I decided to make my own version. I took a single cut file and broke off a couple of pieces. Then I ground one edge to a radius of about 7.5"
I made the two pieces to match along at least the working edge.
Placed a feeler gauge between the files and held them in a wood clamp. It worked pretty well. I took the fret barbs down using consecutive feeler gauges that are .002" thinner than the previous.
The only difficulty was getting the tops of the files aligned during clamping. I may have to make an alignment guide.