Conversation so far:
What was Willie Dixon's adulthood like?
Willie Dixon was a man of considerable stature, standing 6 feet 6 inches tall and weighing over 250 pounds, he took up boxing, at which he was successful
Who did Willie Dixon sing with?
Willie Dixon met Leonard Caston at a boxing gym, where they would harmonize at times.
Did Willie Dixon and Leonard Caston create an album?
Willie Dixon reunited with Caston, forming the Big Three Trio, which went on to record for Columbia Records.
Are there any other interesting aspects about Willie Dixon's meeting with Leonard Caston besides recording an album for Columbia Records?
Leonard Caston built Willie Dixon his first bass, made of a tin can and one string.

Question: did he play any other instruments?
Self-contained rewrite: did Willie Dixon play any other instruments besides upright bass?