Been thinking about Freddie today. First noticed him on Dolphy's first Prestige. A couple of years later Joe Segal had me operate his tape recorder at some Wells St. club to record Freddie and a band I don't remember. I'm sure Joe still has the tapes. Next was his quintet in Madison around 1971 - Junior Cook was in the band. The next deal was at a record store in Boston (I was in charge) and Freddie said "Damn, you have all the old Blue Notes, that costs you money, thanks". This was in his CTI period.
Had a couple of later experiences in a festival setting.
Was impressed with him early on but paid more attention when Lester Bowie told me "Freddie is a mother fucker". Lester wanted him to play Louis in a biopic.