VEXpro 3 CIM Ball Shifter, WCD

Hello, I am with 3140 Flagship and we have broken three plastic housings of the VEXpro 3 CIM Ball Shifter, WCD. I initially thought that we may have improperly mounted the drive assemblies, but the next 2 were checked and they broke probably from stress. Is there a metal (Al) housing that matches the plastic design or do we need to go with the open metal housing that VEX sells?