Hi Burr,

> So you actually "part the spoon" down
> its center of mass to create the surface of the mould?

Yes that's how I did the Spoon mould, but you could do what you said also, where you establish the mould parting face make it a solid block and Boolean the product out, with 'keep objects' option checked so you can use the product again for the other half.

Cheers