I have this led panel mounting frame: https://luks-lite.de/products/aufbaurahmen-aus-aluminium-weiss-fuer-led-panel-120x30 Which is not so nice to install on the roof.

I created the corners to give it more stiffness and the middle bridge for keeping it together, when the one side is removed.

I had my already installed but the idea is,

1. Add 2 middle bridge
2. Add 4 corners
3. Install frame on the roof
4. Add led panel

The cover must be glued to the corners

All printed with eSUN ABS, on Bambus Lab X1.