I have had several spektra halos in the past, 3 total. And while they tattooed effectively and are made well, I ended up selling and trading them off. This was mainly due to the vibration and noise. Now to qualify this, I love a very quiet smooth sounding machine, examples would be vivaces, bishops, and kubins. However I am now wondering if I jumped the gun and sold mine off to quickly. The new slider has been said to make a noticeable difference in the reduction of vibration and noise. Can anyone who has upgraded their halos, or has one of each (old and new) sliders tell me their opinions on this reduction. And if you believe this new version is quiet enough to warrant the purchase of a new one, to someone who wants a quiet machine. Thanks for the input everyone.