Start with a cube

[John Plater]

Three pieces from recent demonstrations, one quite straightforward and two more fiddly ! These need to be better developed to make the fins more even and better finished but I wonder if the assembled knowledge bank has seen these done before. I'm pretty sure that I have seen them somewhere but cannot remember where or by whom.
ATB John

[bodrighywood]

Done this in the round but not in a cube. Should imagine it is difficult not chipping the corners?

Pete

[Derek]

Like Pete have done something similar in the round can imagine that in a cube can mean turning with great care.

Nicely done like the tapered through hole

[Bryan Milham]

Like Pete says, I've also done these in the round, so the fact it's a square make it more interesting.

Did you use a parting tool to cut the vanes? The rounded bottoms in the gaps make me thing you held abrasive down the gaps as well.