Michael,

I meant creating an arc (center, start, angle) in script and one would need the end point of the previous arc to set the radius of the next arc. It would just simplify the script (I think) but I'm sure one can figure out a way to compute the end point with a simple "rotation matrix" maybe.

Creating a spiral manually is easy and relatively fast with this method, I don't think a script is really needed for that except maybe as an exercise in scripting. It's the main reason I suggested it to bemfarmer.

Though it's easy to create a spiral using the Moi command for that or one of bemfarmer script, I prefer to use this method because I have kind of passion for how craftman used to do their work and as I said earlier using arcs as an advantage when one need to start the spiral on a circle, it's fits perfectly and it looks pretty nice as well!

Thanks,
Felix

PS. The more I use Moi, the more adicted I become, incredible program Michael, keep up the good work.