Anyway, just to let you know I'm still alive, I'll post a very short one.
Cut from 0.5t plastic paper...
Now you can see what's going on.
These are not only the partitions but also the supports of the light units.
This way, the light unit can be fitted easily.
Not too long to to the finish line, I hope and believe.
I'm glad to see you all again and thanks for waiting so long!!! ;)