Keep in mind that the fly cutter speed should be around 400 RPM, not 4000 RPM
Slowing the feed rate down definitely helps surface finish (to a point) as does a small radius on the cutting tip. Looks like things are improving for you, and the fly cut surfaces are not bad. One question on the 3rd pucture, did you stop halfway through a cut with the end mill? If not... it looks like you are getting some pullout, which can be a real pain. I would recommend getting some anti size compound, and adding it to your drawbar threads and thrust washer, as well as the outside taper of your collets (not the inside, where they grip the end-mill). Also make sure that your tool shanks are clean and dry before you install them in the collet. What kind of machine are you working with here?
Slowing the feed rate down definitely helps surface finish (to a point) as does a small radius on the cutting tip. Looks like things are improving for you, and the fly cut surfaces are not bad. One question on the 3rd pucture, did you stop halfway through a cut with the end mill? If not... it looks like you are getting some pullout, which can be a real pain. I would recommend getting some anti size compound, and adding it to your drawbar threads and thrust washer, as well as the outside taper of your collets (not the inside, where they grip the end-mill). Also make sure that your tool shanks are clean and dry before you install them in the collet. What kind of machine are you working with here?