Ok I love my treasure chest. For color blending it is perfect, I also like it a lot for black and grey. If it was a tad faster lining would be great too. From what I hear 11volts is the max. Has anyone run it higher without issues? And on a side note, I have noticed a slight vertical vibration like a pogo stick, but only while lining. Is there a way to counter this effect? Or is this machine just better suited for shading? I saw some lines healed and could notice heavier parts of the lines, like what you might expect if you felt a vertical vibration. Not terrible or everywhere in te tattoo, but I could definitely tell.