Thanks for the kind words, it motivates me!
Today I have painted the frame after adding some extra braces to stiffen it up a bit.
While I was waiting for the paint to dry, I made some brackets to secure the rear of the tail to the car. Together with some cheap straps the tail is tightened down to the trunk.
For extra crosswind protection I have made some braces that go into the trunk gap.
Then came the hard part, making the side panels.
Besides from not being easy to cut, acrylsheets do not want to bend very easy. I had convinced myself that it would work after I had nicely bended a small piece.
Unfortunately I was wrong.
It looks horrible, and since I'm already over the budget I had set to myself I think I will just get some nice aluminium sheets to cover the sides with. Can't leave it looking this horrible.