Milling slots using rotary table

Hello,

Could someone check out the attached project file and let me know what I'm doing wrong. It does not seems right when running the simulation, like when it engage the end mill. Ignore the gouging as I want to be able to cut the slot to any width I want. Also for some reason with the default settings, it wouldn't rotate the part fully 360 degree so I had to use "Exit overlap" under Overlaps to make it cut all around.

Is there a better way of doing this? I tried Rotary machining, but couldn't get it to work. There is an option called Cylinder radius under Transformation... any idea what it does? Lastly, any suggestions for feed rate and step down? I'm using 2flute end mill and not 4 like it says. Running Sprutcam 11.5.

Thank you