You also might try experimenting some with MoI's circular array command, applying some vertical and radial stepping.

For example starting with this:



Then a circular array with some vertical and radial stepping used:



Scale array used ( http://moi3d.com/forum/index.php?webtag=MOI&msg=275.109 ):



Circular array applied again:



- Michael

Thank you Michael, I have used Array so far only for simple radial
multiplication and not considered using it in the way you demon-
strated - very good !