If you suspect the hockey sticks a simple way to check this is to swap them left and right and see if it pulls the other direction. I also took a cue from Jason Shreffler (sp?) and swapped the stand-offs where the hockey sticks connect putting the threaded one on the bottom. This allows me to have the chassis sitting on a flat setup board as I tighten down the screws on the hockey sticks to ensure it stays absolutely flat.