Hey Mike, I got mine and love the Machine but I too am having a problem with the vice. It will stay tight and work fine but turns side to side when plugging in/unplugging the RCA when swapping machines (I hold the tube as I switch). Doesn't really turn on the machines vibrations so that's good and I feel like a lock washer might solve the issue, I haven't had time to solve it myself though I wanted to give it a good long test before I said anything but I see someone else mentioned it already. If you could send me a green replacement so I can have the peace of mind it would be greatly appreciated.

Otherwise this machine is FUCKING BOSS. It took me a bit to figure it out but now I really CAN NOT be without the built in light. I don't use t-techs so I have to switch machines but it's been in my rotation every single time. It's only been about a week but I really love this machine. It's louder than I thought it would be and when the machine starts clattering against the magnets while tattooing I wasn't really comfortable with how it was coming out. The manual said to run it at 9-10v but I wasn't feeling very comfortable with that speed. I like to run my machines low, smooth and quiet (that's what I make my coils run like) so I dropped it down to between 8v - 9.2v operating depending on color or grey and adjusting the needle hang and it really started to run amazing.