With the help from my friend Dennis this part went without any major problems although we had to search too often for hidden pieces. There were also a few misdrilled holes from previous attempts but all in all no sweat. I decided to add a spongy tape between the window and the cabin frame too induce a constant pressure from the rivets and, hopefully, avoid possible rattling against the frame. Later, I will put some kind of wide tape over all rivets in the window and on the roof just to avoid water penetration. I think this is important in the long run. I used a modified version of the Al-profile to fill the gap between the window and the wing (pict3). Thanks for the template Nate! It wasn't easy but it worked better than the icp standard version.
