Works but mechanically poorly processed

After unpacking, first noticed that loose parts in the housing rattle around. Since this condition was already described in other reviews and I had no desire to return the unit back, I screwed it. The metal casting already described, which serves for weighting is attached to two thin plastic pins and bolted. One of the two pins had broken off. Obviously, these are a system error. The inertial mass of the casting is sufficient with the roughest transport to cancel plastic pins. Hot glue has repaired the damage. The screw in the broken pin could somewhere caused by McMurphy certainly on the board a short circuit. So either return or before commissioning Check for loose necessarily electrically conductive parts. Otherwise, the unit is working.