Printed well without supports and works great (also for Fritz!Box 7510)
My only criticism is that the little pins to attach the Router start printing in mid air. Instead of this unsupported 90 degree overhang that would theoretically need support to print really clean these pins could be made with an angle so they don’t require support. I only noticed this halfway into the print and it still came out ok but I think this could be improved. After a little clean up with some snips it also works well now.
I attached it with double sided tape instead of screws.

