I have been trying to make one of your masks. I purchased the owl mask from Elktracks. I am not having any luck at all with the leather skiver (thinner) you are using. I have changed the blades, held it differently, asked other leather makers for advice. What is the trick? You also state that it is easy to take too much leather off -- I can't get any leather at all to come off. Thanks for any help you can give.