But I do not know: were the re-recordings partly born out of necessity? I believe Mr. Adams's masters were casualties of the Universal fire. If memory serves, he tried for years to get a straight answer regarding their whereabouts as he wanted to assemble a compilation album. I don't know the full story but perhaps someone on this website can fill in the blanks.
Also, re: Summer of 69 - I'll bet his neck was really sore by mid-August.