I worked as the "piano tuner" for a number of years in Kansas City during this era. I worked all of the shows until leaving for the west coast in 1987 to work in tech service for YAMAHA.
I met and enjoyed, and re-connected with a number of artists from this era and onward until present times.
The local performance was a 'one-of-a-kind' I will remember fondly.
Can't remember the opening act for whom who I tuned the piano, but Gary Wright was certainly memorable.