About two days ago i got a mongoose thunderball with maxpro discs and when i originally rode it both seemed like they wwere constantly rubbing and the back was always a bit kinda held back. Anyway i took it back to the shop and they said that the discs were a bit warped but alot of discs come new like that. So he fixed it up and the back is riding well and the front still rubs a bit but the squek was gone. I took it back agian that arvo aand he said over time the front should just come back into place. Anyway this arvo i was riding some pretty easy dh trails and the front is squeaking again and it is more notcieable. SHould i take it back again, does anyone have same experience with discs.