Tuesday's MEDICINE BALL CARAVAN (11am-noon Central Standard on 88.7FM locally or www.krvs.org) airs the newest releases by Gangstagrass, Robert Ellis, VOoDavisand Tedeschi Trucks Band. Also: some Brushy One-String, Kaki King, Willy DeVille,Procol Harum, Ten Years After and vintage spins by Paul Gayten, Blazer Boy and Tommy Ridgely.