The present invention is a semiconductor device comprising a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. The Al2O and Al vapors generated in slag making and metal making steps are recovered in a vapor recovery reactor, and treated with a carbonaceous material to produce recyclable material comprising Al4C3. The waveguide is capable of carrying a number of wireless signals. Multiple bulkhead panels can be stacked to handle larger payload weights. A controller monitors a first parameter as an oversteer flag associated with the first control sub-system and a second parameter as an understeer flag associated with the second control sub-system.