I adjusted the top before installing it right out of the box, the bolts holding the brackets were loose. It was a bit tedious, but did adjust them properly. After about 1 month or so, the top was rattling louder than ever, so I checked and the bolts were loose again somehow. So I tightened again, but the top itself has rattled since day one. I wish I had seen all the posts on this company before I purchased the top. You get what you pay for I suppose. I should have simply bought a new GM top from GM....
I usually have the top off when I am driving, as the car is not used very often, but want to make sure when I have the top on I only hear the roar of the exhaust, not the rattling of the top!