Hi Michael,

Thanks for the kind words & Yes, I'm finding that everything is now starting to come together for me in MoI.
I've also found that it's much easier to concentrate on the creative element when in MoI, much more so than in Rhino.
Your whole principle for designing MoI has proven itself to be correct, so I'm very much looking forward to purchasing V1.

I know what you mean about the file size increasing with extra detail, that Tattoo Machine file is already at about 8.3MB.

Thanks for that screw thread info.
Strangely enough I originally tried it just as you've described, but couldn't get the two parts to Boolean Union?
Maybe I didn't have enough of the Profile shape overhanging into the centre Extruded core??
I'll try it again & see how I go.

regards Colin