When I tuned & inspected snare drums @ Rogers drum Co. in 1968 it was per instructions of Roy Burns,- research & development Specialist, CBS drummer (Merv Griffin show) & Benny Goodman's drummer (Chicago Worlds Fair). I was referred to the job by my teacher & mentor, the late Jimmy Green & a mutual friend, who also worked there, Bill Davids.
I have only 1 Dynasonic snare-drum (chrome shell) which I still use. I did get to use the facilities after hours to re-cover & re-bevel my personal set at that time (an older Gretsch kit, that I wish I still owned)
It was a great job and I was sorry when it left Dayton. I hadn't worked there long enough to be offered the position @ the relocation in Fullerton.