just received my new Centri machines and got to say these things are amazing the updated housing ( to aircraft aluminum ) the throw adjuster and all the little tweeking that was done make these a complete joy to use..... I've only had for a week so I'm going to run them a little longer before posting a complete review with pics... but at this point I have no complaints these things are butter...check out Centritattoo.com for tech and specs...... I have also opened the machine with the builders permission and was impressed by the simplicity and how that transfers to amazing yet almost effortless work.... if you need to know buy one but it could be the future of rotaries who knows...... i know i wont be selling mine anytime soon I have numbers 4,5 and was the only person in the world using them for about a week as a test ...youn wont be disappointed