Hi Thomas,Great song! "Tune Up" was the flip side of "Do The Boomerang" and reached Billboard single #10 R&B/#36 Pop in 1965 ("Do The Boomerang"). Nice B3 on "Tune Up". The organ and keyboard bass player in All Stars Band was Victor Thomas. I think it's Thomas who is playing organ and basspedal on the flip side!?
I listen a lot to Jr Walker and The All Stars. But I don't play so many songs from Jr Walkers "song lists". Hard to play and without the altissimo tones and flutter tones the songs becomes flat and boring. But they are players that are playing very good in playing in the style of Jr Walker. I use to play "Cleo's Mood" and "Satan's Blues", in my own way!!!!
How are you my friend? Your right about the B3 sounds great, all of Junior's keyboard men have been great players, much better than King Curtis's players. Many years ago i played a B3 & C3, best organs on the planet especialy with Leslie Speaker's. Give me a good Guitarist, good Drummer, good Bass, B3, and a good Tenor, and you've got a sound made in Heaven.