I can replace the small mounting part no problem. For the housing, such a mistake is possible because all tests on the board occur before assembly. When things are hand made their is far more room for error and the only checks are on electronics and unfortunately it does happen that plastic pieces don't get threaded etc, but this was the first multicontroller without a hole in 4 years of production and I could send you a new housing if you like or install yours in a new housing for you since it can be difficult.