Lucky Mulligan plays a Kala concert ukulele with a cedar top, acacia sides, and a mahogany neck, with inset pegs, and a very warm tone… and is definitely not being paid by Kala (based in Petaluma, CA) to advertise their extremely high quality ukuleles (but has availability as a brand ambassador).
Lucky has bad knees, so, no, he doesn’t haul around or play larger instruments, like six-string guitars, you ableist swine! (No, but, he does love you. He’s just bitter about instrument snobs and people with better knees judging ukuleles. He promises his ukulele is of a higher quality than most you’ve heard.)