>>is your script embedded in the 3DM file ?
No. MoI can't embed scripts in 3dm file, but it can store a history data.

Forgot to say, in your particular case you can use rotate command manualy. It will be faster than using vClone. But vClone is much more flexible in most cases.

That's what I was after, thanks for that !

Getting there with my 3D modelling toolbox/workflow.

Model in MOI,export as OBJ, Import in 3D coat, then apply merge and smooth, Render in 3D coat, and in a few weeks investment cast in silver.