Self-built fender expansion! Your opinion is in demand.

Hi guys, I was in the garage again the days were going on. and I started to make my fender spread, because I don’t want to pay 250 euros for it. But isn’t quite finished yet. Now I would like to know what you think about it, what has come around like that!? And right away ask how I best place it with the tüv?? With friendly greetings ———————————————————