Just a technical point: -- Any incredibly slight variations could easily be accounted to the simple act of copying the set, then copying it again and again -- like a photocopy, data does indeed degrade (however slightly) every time it's copied. And when we're looking at variations this small? Get real, bud. -- Light sets are poser script files (text), an error in copying would happen in a random part of the text file and not just in the characters that happened to be behind a comma. Errors in digital copying are rare (the copy is usually checked for errors) and when they happen it usually means that the file no longer works. Digital copying is as far away from photocopying you can get, photocopies are not even close to being the same as the original they just are similar enough to fool the eye. Beyond that: CL can't dictate what can and can not be copyrighted, if a light set is advanced enough it can be copyrighted as a pattern. Staale