I have a new Idea that requires me to engrave photos of faces on glass. The u-tube videos I have watched have shown me that a transfer mask gives much better detail to the work, and I'm finding this to be true. My question is what type of medium tack mask do you people think is the best for this application? I have a Trotec speedy 300, 80 watt laser, and would also like some input on what settings you might suggest? I know all machines are different, but opinions would be cool. I have had some fair results 100 power and 100 speed, but am not so pleased with the mask I'm using! Thanks for your thoughts folks!