Hi Michael,

Sorry, I should have said that I've been doing CAD for about 2yrs, but only with a very basic program called 3D Engrave.
It's part of a the software package that comes with the Roland milling machines.
Works with polygons & vertex points which is fine for simple straight forward jewellery designs.
About 8mths ago I started learning to use ArtCAM, which is more elaborate & introduced me to 2 rail sweeps.
I then started trying to learn Rhino which I found totally overwhelming, as I didn't understand any of the terms used.
That's where I found MoI so much easier to use, the UI wasn't as confusing for me & I could actually produce usable things!
There's still features in MoI that I don't fully understand & haven't used as yet, but I'm slowly getting there.
Prior to starting down this CAD/CAM road 2yrs ago, I'd never really used a computer before, so everything's very new to me.

regards Colin