Not trying to be a jerk, and I'm sure you have already checked their site FAQ, but just in case I checked and I found this on there... not sure if it helps:
Quote:
I just installed the Roof Rack on my Z, how do I stop from shifting?
Tighten all of the Lock Down Straps equally. Shifting is a result of loose or unevenly tightened Lock Down Straps. After installation the Roof Rack will go though a settling period where it will shift around small amounts until the tension on all of the straps has equalized.
|
So maybe it's just going through the settling period?