Many people really miss the main point. All really depends on the stick out of the tool. The shorter the stickout the faster you could go even with 1/8" tool. i would greatly recommend HSMAdviser. Not only its a great program, but most of all opens your eyes about when you change this and that how to achieve the even most important main point of all this- better material removal rate . At the end id does not matter what you do and how you do it. The removal rate matters.