Initial problems .... but then Tip Top!

When unpacking you realize immediately the good to very good quality of the material and immediately feel that the one has the protective sheath long time. At the first "creation" but then came the sobering - they did not fit .... after a certain frustration time .... I tried it again and lo and behold, the envelope was perfect .... What had happened? .... One can not fully raise the shell, it must be left up some air so that the widest part of the traffic light screen is also at the widest part of the shell. !!!