does ant body know of a supplier of this tool,it is an American idea ,and it measures the tension on the armature bar,in grams ,so you know what tension the needle is hitting the skin?I have rang around a few good tattoo shops and they have never even herd of this tool.if you need to see a picture of this tool ,google national tattoo supplies(u.s.a).and its under tattoo tension gauge,(looks like a paint scraper-with a torque arm on it to measure the tension on the armature bar!)it measures in grams so you know what is hitting the skin for lining and shading!thanks