Leon Davis' namesake restaurant LD's BBQ has become a destination restaurant in Walworth County. He's coming to terms with his mortality but assured customers the meat he made famous will live on. Davis still visits his East Troy restaurant but walks with a cane and can no longer cook brisket and ribs how he used to. He was diagnosed with renal cancer and said he may not have much longer to live. "It's spread into my bones," Davis said. "From my…