ok,,,,I have two of these things now and im not sure how to run them,,,ive been using the silver one for shading and colouring and the black one is for lining but they seem to be the same but the silver one sounds louder than the black one,,,,i run the silver one with a nine mag mostly and needlerunner at 8 to 10 volts and it works nice i use a EIKON EMS 200 power supply,,,,just got the black one so going to test it out as a liner. stupid i know but im useless at machines so i would love some advice....if i could i would swop them for a couple of good coils machines because im not fussed on rotarys at all to be honest!!!rapiers.jpg