I made up the outer part of the spoiler out of 1mm steel. I want to avoid welding on the outer section so I flanged both sides and then using the shrinker/spoon to form the curve. I still need to make the inner part but first I will need to position/lock the hatch into position. The spoiler can then be positioned and welded onto the hatch section.
Well the next job was to flange the hatch to match the roof flange in one plane. The hatch had to be shaped (cut) in the opposite direction from the original panel to make it match up. A T seal will be fitted between the two panels and one side will be bonded to the roof and the other will overlap onto the hatch. Now I just need to match up the roof and the hatch in the other plane which you can see from the last picture requires a bit of design/tin work to make a small rear spoiler.
I needed to box in the roll bar for the interior finish and the original plan was to weld the Jaguar and Audi roof/hatch together but this could give me access problems later. So I decided to make the hatch part removable. Since there will be no boot just a parcel shelf and also because the two panels are different shapes in both directions I decided to make the hatch a bolt in/out affair. So I needed to flange the roof end section and to machine two locating lugs/pins. The lugs are to be welded to the hatch and the 16mm diameter tapped pins will be welded to the roll bar. The next job is to flange the hatch and make the rear support brackets.
Because of the height/location of the bulk head the roof angle ended up wrong. I made up a couple of jigs, the one made of angle was to help hold the shape of the roof before cutting and during welding and the MDF one was to form the new shape at the back of the roof.