MeshCam Toolpath help

Hi,
I’m experimenting with cutting some keyboard keycaps on my Nomad and I can’t figure out what is causing the toolpath to have the step out 2-3mm down from the top of the keycap.
updownkeys.mcf (180.6 KB).
I’d love any insights on this?
Thanks
Dave

Ohh I think I’ve figured it out. It’s because of the tool I selected. If I pick a larger ball mill the artifact goes away. I guess this is because of the reach/dimensions of the end mill?

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