Stepping an undercut tool in a Z positive direction

I am trying to back cut a bore after it is sleeved. I need to start at -.5 and work it up to -.435.

I have tried using the dimensions as my starting z plane ending z plane. I have also picked the top and bottom surfaces and it still wont produce a tool path.

Is there a way to do this by using roughing step cuts, other than making 4 individual cuts, each stepping upwards in Z ?

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