So i bought a Vivace from Ray at the Paradise convention in Keystone Colorado last year. I was a little sad as it didn't work very smooth. It fluctuated voltage up and down and would loose power so I didn't use it much. Two weeks ago I called Ray and told him about it so it was sent out last monday. I got it back this wed, just a little over a week total time and it seems to work flawless now. Very smooth and consistent. There was no charge! The guys at Neotat are awesome! Just though I would share my little story. Thanks!!