Used a Diablo+ today to re-line an entire sleeve I had started with coils five years ago..liked it a lot. Hauled ass across the whole arm and made crisp smooth lines (7 round) About an ounce heavier than the dragonfly, same basic setup but maybe a little louder. Lines beautifully at 7 volts and the give out just a little. Really sexy machine (my client's words). Can't see anything wrong with it at all..after a log some more hours on it I'll write a full review.