has anyone used them? lurked a bit to see what i could find out, and theres very little info on how they run or if they're worth the cost, right now i'm using an og bishop with maxon motor for color work, hm mini evo for lining, and an eddie lollis for grey work. i've also used a hyper2 and special tech tracker, how does it compare to any one these machines so i can get an idea of wether to get one or not.