Zank inlay - Trouble with the plug toolpath

[pixl8ed]

I'm trying to cut a star shaped plug for a Zank style inlay and having trouble with the toolpath.
The inside corners of the top of the plug (or bottom of the plug when glued in) are getting rounded.

Details: 60 degree vbit
0.25" plug depth
1/16" (0.0625) air gap between plug and pocket surfaces
Glue gap is in the pocket toolpath

What am I missing?

[FixitMike]

The rounded part will be in the air gap and doesn't matter. Try different flat depths and watch how it changes.

[pixl8ed]

It wasn't the rounded part in the air gap that was bothering me, but the rounded edges at the bottom of the plug -- I thought the pocket was prismatic, with all flat, non-curved sides.
I just took a closer look at the pocket, and it's got the same curved sides, and matches the plug.

Color me