Doesn't work for me. Once in a while I get the expected shape if I start with the simplest of shapes, but most of the time I get "Error in Quick Lathe: undefined method 'position' for #<sketchup::Edge:0x113...44".

I'm using SketchUp Pro 2013, Version 13.0.4811. Is ther an update?

...and what does that strange "The path you've chosen doesn't begin or end on the extrusion cross section" dialog mean. I see that almost every time I use the Follow Me tool.

Thanks for the feedback. However, when I make the spheres inside of one another as suggested, then slice the sphere in half, there is still no inner sphere. Also, if I select the outer sphere and 'Hide' that one, again, no inner sphere.

I followed the animated demo carefully, creating the flat circle, then a large circle perpendicular to that with another smaller circle inside that. Then I use the Follow Me to using the flat circle as the path. The inner sphere forms first, then the outer, and I think I'm done, but every test I run after that indicates only a single (outer) sphere.

What am I doing wrong?

Thanks in advance.

I'm struggling to make two concentric spheres. I can't use the offset tool on a sphere...I've tried making a copy, scaling one copy down, then putting the smaller one inside the bigger. Everything works fine with this approach except putting one inside the other. Each time I try, the inner sphere 'attaches' to one of the outer sphere's surfaces instead of remaining centered (concentric) within the outer sphere.

Is this possible?