I entered this as an engraver, but then I wound up editing the tool database directly after @WillAdams told me how. Here is the salient part of that thread:
I have done a test run with that bit since I entered it:
In the file I sent you, I did a first roughing pass with ¼", then a roughing pass with ⅛". The ⅛" is taking so much longer than the ¼" run, I assume that it will spend a lot of time cutting air. Conclusion, the ¼" cut is useless and perhaps I should go directly to a 1/16" roughing pass?
-e