awesome feedback.... nice to know i am not the only one that bends the needles back to ride the tube.... I recently have been running my Halo 4 mm with 11 envy regular mags for color and I am amazed... and I am running it from 6.6 to maybe 7 volts only.
and it is sooo fucking soft... could literally feel the needles massaging in the ink. The only thing that bugs me is that there is a loud annoying vibration rattling sounds when your in the skin coming from the nipple housing of my Halo.. so annoying.

Anyways, now I see how soft and efficient and trauma-free they can be,, I was told by some idiot on here to run em at 8-8.5 and i ruined some guys leg a few weeks ago, using bug pins, which combined with the high volt power was a bad combination....

I was about to sell my Halo and RW ID, but after i switched to tapered coloring needles and lowered the stroke speed to 6.6 to 7 .. fucking bingo nuggah!

i was all crunked out, ruckin truckin shitup mang.

So in conclusion... how does the DD style vivace compare to the halo?

And did you say you can change out the needle clip on the vivace?