I have been a Die Hard OS Vspec 21 w/ 2050 pipe fan for the last 2 years. After this weekend I am a believer in Go Technology. Brian Carey w/Pro Twister Mods hooked me up w/ one of his 7 port Go motors w/ the Go Tech 0801 polished pipe. Awesome power combo. Stronger and more linear than my Vspec, and hold a very good low idle. I run OS P3 plugw/ Rocket Science 30%. If anyone has had reservations about these mills (as I have), fear not the Go Tech stuff is VERY STRONG.