Thanks, Eric.
I meant to point out that while I used a CNC to cut out the jig, it can easily be done on the drill press by,
- Clamping a piece of scrap for the jig onto the DP table
- Drill the 1/4" through the scrap
- Without moving the piece, swap the 1/4" bit for the forstner bit of the required size
- Drill the counterbore part way through.
- Add a short stub of 1/4" dowel for the centering pin