barrel rifleing in MOI3D

 From:  GuyLuke
11333.1 
Hi All.

Can anyone give me some tips on the best process to complete this in MOI3D?

https://www.youtube.com/watch?v=8r3E0oU2Ws4

I mainly want to know the best process to get a nice smooth twist in the 'star' shape. I tried a few methods like sweep along a twist and lofting between two rotated shapes but I was not getting a satisfactory result.

As you can see from my file, the loft is 'straight' and does not curve between the shapes.

Thank you.
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