I remember All Cromwell well. Did he release a 45 of Don't Think Twice? I remember hearing him sing it on Hamilton radio but can't remember if it was live or a record.
He had an Art School friend named John Layton who played a Goya Goliath sunburst guitar and played in a Hoot in west Hamilton where I was also playing (with Goya Goliath sunburst guitar). I remember that he made a big impression on me. I believe his dad was the wrestler Lord Athol Layton. Is he still playing?