[nebogipfel]

Not too many of us have access to a vacuum chamber...

Hello Tony,

Yes, there are some nice little units available (Ebay) for around £140, which probably isn't too bad if you make good use of it.

One alternative method, 3D printing, very much in vogue at present, looks like quite an expensive hobby. That said, with a printer you don't need a physical item to take a copy from, just a good 3D drawing.