My factory sunroof has one corner that appears to be lower than the roof level and is causing a small leak on the front passenger side corner of the roof. I have taken the sun roof totally out and all of the drains are clear and the water channels are not cracked and in good condition, so all I can figure is the low corner is causing the water to wick in underneath the sun roof rather than it dropping straight down into the water channel and out the drain tube. I want to adjust the corner up to be level or slightly above the roof line like the rest of the sunroof is aligned. Otherwise it works perfectly. If anyone can share information on how this is done I would appreciate it. The local sunroof shop wants $100 just to check it out.