Forgot to mention that between the top trim and the windowframe that i am making is a 3mm neopreen strip. Sinds i dont have a welding machine i try to reinforce all the way i can. Corner pieces with 3mm tread in it. To big or outstikking parts are no problem for the file. Mounting the windowframe on the desk. Because the desk is just a few cm longer then 2mr i find the inside panel a bit wobly and want more hinges in. I need a mounting point somewhere in the middle. More reinforcing plates. I soon got a idee how to fix this. I call them bridges. It keeps the panel from moving and this way i have a extra mountingpoint for the hinges. Its late "its always late when i stop".