Any thought of adding a full radius keyway cutter to your 1st op on the track links so you don't have to mill the inside ends of the track links for clearance in a 2nd op?? Like I said, I have been running 4 axis Okumas for over 20 years and know a lot of short cuts!! Also, you might want to look into fine-tooth roughing cutters to hog out most of the material on the track plates. Looks like you used 1 on 1 end of a track plate??
Just some ideas
