Some nice pics there guys.. I used to have similar problems capturing defects photographically on Chrome plate components to send to suppliers in my job, ended up with various 'Lightbox' shaped contraptions on my desk at work, funnily enough no one ever asked what the buggery I was up to!! As always the 'Devil is in the Detail'!!
The coins are stunning too, thanks for taking the time/effort to share such nice pics!!
I must agree a mascot or other identifying mark/icon is very handy when posting pics, don't forget if you email the pictures to yourselves you then have proof of ownership of the pics and can sue any son of a gun that steals the pics for profit! Even the British sovereign dealers copyright their images for the same reasons mentioned in previous posts!