I'm totally in accord with your opinion of PR's singing. If I could graft any voice it'd be his I'd go for. Being old i had the pleasure of seeing Free at least six times when they were coming up. The first couple of times in a tiny club in Wolverhampton called the Catacombs. I was sat on the floor no more than 8 feet from Mr Rodgers. To say it was an experience is putting it very lightly indeed. Paul Kossof's guitar playing sounded like being stabbed in a very pleasant way.