3d carve, steps at the edges

I have been noticing that when cutting a 3d project in pro, the outer edge of the project results in steps each time the bit is changed for a smaller diameter.

It seems like each cut is on the Border line instead of inside the line so each time a new/smaller bit is used half the diameter shows, outside the set dimension as an unwanted step.

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That’s a good point — I believe that this is an inevitable consequence of using smaller and smaller endmills — clean up w/ outside Contour path after?