Ah, nice to know it's a pretty painless fix for you, Michael:-)

The work around was dead easy too, so I'm a happy camper once again!

Many thanks.



Martin.

A few more rail revolves, with a clothoid and Epi- or Hypo-cycloidal speed reducer scripts:




(Also did an icosahedron using only MoI commands, mostly mirrors and rotates.)

- Brian