do u guys use different aluminum in each run becuz in the first run of purring 2 and ac2 when u bind and as it comes up it makes this perfect sound. http://instagram.com/p/lbQZbRODPz/ like in this vid and the one after and runs after doesn't make this sound :( this sound is like Angeles singing
All the same manufacturer and 6061 aluminum. So not sure about that. Could be the bearing maybe? - Chris