On my quarter windows I dry fitted them and I was able to run them up against the drip edge for a good fit.
The passenger side went on perfectly but the rear of the drivers side slipped about an 1/8".
I just tapped the drip edge down a bit to cover the gap.
The guy at 3M said I could use isopropyl alcohol and a 50/50 mixture of water to clean the surface and then when the tape was applied put a little on the sticky side of the tape to be able to shift the windows a bit.
Then as the water/alcohol evaporates it actually sucks the tape onto the surface it is being applied to.
Edit: I have seen on a couple of different threads people talking about the amount of tape it takes.
I have seen 5-8 feet for both windows but that is incorrect.
When you pull the old ones off they have tape all the way around the perimeter which requires appx 7 ft per window.
30" pieces top and bottom / about 15" front piece and about a 4" rear piece.
[This message has been edited by TXGOOD (edited 06-18-2012).]