I have six of the tracks on a Brtish Capitol/EMI LP called The Great Big Bands, Volume 2.
Well-informed British critic Alun Morgan made the following soloist identifications:
"Opus" Kamuca, Touff, Herman, Collins
"Where" Herman, Kenney, Kamuca
"Ahab" Moon, Kenney, Kamuca, Walp, Travis
"Sentimental" Collins, Moon, Touff, Herman, Beal
"Duke" Herman, Touff, Kamuca, Nimitz
"Cat" Collins, Woody, Nimitz, Touff