Warning, spoilers ahead:
Nice. I'd been thinking about this one since it was posted, and didn't think of this solution.
I thought it was going to be a Loft to make a 1/6th segment of the whole part, then a circular pattern of the segment... I couldn't figure out the sketches for the Loft.
The only problem is that you'll need to make an axis for the circular pattern. IOW, another feature...
No idea how circular patterns work in Inventor, but I suppose that the 3 main axes are supported without adding them.
Am I right, @cadcloud-1?
That's why we make a different discussion so that those who don't want to know the answer won't check it...
Others - like Fred 😅 - who want to see it can - then - see the Answer's discussion.
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