After I did my notch-to-fastback conversion, my roof panel squeaked a bit. Haven't noticed it in a while, however.
If you want to lift the rear edge of the roof, you'll have to take out the headliner. There are some 10mm hex head machine screws that hold the roof panel down.
They may be "off color" just a bit (anodized?) They don't look like any of the other fasteners, under there. I think there are three along the rear, one or two on each side, and two or three along the front. They are around what would be the sunroof opening, if your car had a sunroof.
Be very careful when you lift the back edge of the roof. it's very easy to crack your roof panel on the sides, or at the windshield pillars. Don't ask me how I know this.
If you can lift it just a bit, you can squirt some butyl rubber or something under the edges.
[This message has been edited by Raydar (edited 11-27-2017).]