My 1W blue works nicely on wood, but getting a practical lens/galvo system would be a nightmare. If the surface is planar, I'd think more in terms of an X-Y sled approach, but that would also allow you to use one of the multi-watt NIR lasers that deliver through fiber. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .