Hope you guys can help. Ive been racking every canopy I purchase on my pitts and im not sure why. I use an acrylic drill bit (going slow) to cut my holes. I then use my dremel with the conical grinding stone to ream the hole a little more as well as smoothing out the inside from the drill bit. the underside of the canopy has the aluminum strip that goes from one side to the other. ON the top I just have a small screw with a nylon washer. the screw is alot smaller than the drilled hole as to alieve any stress. every time I come back the next day I have a crack. Please help. and no the screws are hardly tight.