Trace Velo over on youtube has some cassette vids I think using ZTTO and VG sport, not 8 speed though. For what is worth I'm running a ZTTO BB on my mountain bike because they were the only company that made a thread together(wheels manufacturing style) BB that worked with my specific situation. I've only had it since June but so far so good. If it lasts a year it will match the last Race Face BB it replaced.