In the interview with Gary Usher on his CD, he says that he sang some back up on Jan & Dean. He also said that Jan helped him as well. He said that himself, Brian Wilson, Jan Berry, and Melcher were just a pool of talent that helped each other ( I'm paraphrasing) This interview was in the 90's, I believe. So whatever bad feelings he had for Jan must have been forgiven. He also talked about Roger Christian and how he got Roger and Jan together. He said that Roger and Jan wrote many many major hits together. The main thing I liked about Gary's interview was that he didn't twist things to make it look like Brian did everything. Brian was mentioned as a major talent and that he worked with Brian and Brian and Roger worked with Jan.