It’s long been rumored to be Casper but I really don’t think it is. At least not to my ears. I am in Cincy, and Bootsy is appearing this weekend to promote his beer. If I can get close to him I’ll take the disc down there and ask him. There is another comp with a “Boots” track on it. One of the Sound Of Funk series. Don’t know if it is same track.
Deeper still is the Can’t Stand The Strain instrumental. If sounds just like The Funks version with some additional guitar on it. Apparently, it’s on the other side of the Donald Austin album. I pulled it up on spotifiy. Someone sent it to me years ago but until just now I never knew where it originally came from, I’ll be damn.