I fully understand the ethics of this discussion BUT a lot of name rotaries are built around cheap but quality motors and plastics that are cheap also so i honestly believe the difference in quality isn't as great as the difference in price. I have a stealth copy that cost me £20 that i use regular as it shades and packs just as well as machines i've bought that were X15 more expensive!!!! I will continue to support the original builders purely on ethics and principle NOT necessarily because of the value of their products.