Having a blast running with these machines! So far I've got the 3.2 & the 4mm...think I'll be picking up a few more before I'm done though. Been trying to think of how best to describe tattooing with them and the best way to put it is that they are just flat out fucking fun! More to come...I'll post a full review once I've ran them enough to have them down (only had the pair for a week), but they've more then lived up to the hype that's been placed on them. I feel something needs to be said about Gaston's customer service. I've dealt with pricks over the years, and I've met a lot of good people in this industry...but then there's those approach their business in a way that's really exceptional. My experience(s) with FK Irons have been just that.