I do not have the Vicace, just the older med stroke Neo Tat. But I wanted to help and try to clarify the ideas here. Voltage can help you just as much as it can hurt you. Trying to line with a rotary with no give is very different from a coil. For each piece of skin you have to find the sweet spot with voltage. Usually depending on your needle size I find it is between 8-10 volts. I would not recommend higher voltages to start. I would really suggest starting at 8.5-9.5. I use mostly tight 5s and tight 7s, ad have found that most places 9 - 9.5 and not hanging the needle out as far as I like ( stops snags ) and I can move almost as fast as I did with coils. The big difference being that, my lines are 90% more likely to be perfect in one pass. I find that running it too fast gets more snags in the skin and a less solid line. I started at 11 volts and have since slowed it down a lot. Mostly because I am stubborn and had to make this machine work for me. Now I love it. Granted this is not the Vicace but a similar machine by the same maker. I think what Allie and G.graves said is really gOod advice.