> Of course, using a point-and-click interface, it's not possible to do 
> POV-Ray style tricks like positioning a sphere exactly at the end of a 
> cylinder...

Of course it is.  You can even tell it that the sphere is referenced to that 
point on the cylinder, and to make the radii equal.  So when you change the 
cylinder length or radius, the sphere changes position and radius to match.

You've never really used a modeller have you?

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