How are you positioning the head to do that. If the head is mounted longitudinally in the X axis, the how can you interpolate a radius in the Y axis, using a G02 or G03 interpolation in the Z axis, without at least 20 interpolations per stand? That is figuring on a 1 inch wide stand with a .050" stepover per interpolation, which still won't give that great of a finish, imho. And, it's going to take the same amount of time????? Maybe I can learn something new here, and hopefully I can.
Also, if an approximately .150" deep roughing cut, in aluminum, is deflecting a 7/8" ball mill, in a modern CNC, something is wrong. And then there is a .020" spring pass to clean it up. It better not deflect there, even with a dulling cutter, And, you have modern coolants/lubricants to maximize tool wear, and provide a great finish. I find it hard to think an interpolation is the way to go. But, I'm sure I'm missing some considerations, so if I can learn a new, better way, I'm the better for it.
As a side note, I used to machine ball bearing bores in racing manual transmissions and was not allowed to interpolate those bores. If caught doing that, I was assured I would be shown the door. We could only cut them with a boring head. The reason was because interpolation still uses a point-to-point toolpath, and is not a true radius like could be achieved by using a boring head. The trans were built for NASCAR, so it had to be some of the most nit-picky stuff I have ever seen short of the aerospace industry and NASA.