Coupla comments:
and the label didn't seem to like Smile
As the Capitol execs never actually heard any of the
Smile sessions while they were in progress, that's hardly a fair comment... and right up until Brian said he was scrapping it, they were waiting impatiently for it.
Also this almost 'ban' on Brian producing/collaborating with other bands strangled a vital outside influence that all bands require to grow. After all, the Beatles were forever collaborating with others and writing songs for other people when they were together and this can only help an artist.
Huh

Here's a list of Brian's non-BB single productions 1963-65:
4/63 Honeys Shoot The Curl/Surfin' Down the Swannee River
9/63 Honeys Pray For Surf/Hide Go Seek
10/63 Sharon Marie Run-Around Lover/Summertime
12/63 Honeys The One You Can't Have/
1/64 Survivors Pamela Jean/After The Game
3/64 Castells I Do/
3/64 Paul Petersen She Rides With Me/
4/64 Honeys He's A Doll/The Love Of A Boy And A Girl
6/64 Gary Usher Sacramento/Just The Way I Feel
6/64 Sharon Marie Thinkin' 'Bout You Baby/Story Of My Life
6/65 Glen Campbell Guess I'm Dumb/
9/65 Bob & Bobby Twelve-O-Four/Baby What You Want Me To Do
During the same three years, he also co-wrote tracks for Jan & Dean and sang bvs on releases by J&D, The Hondells, The Timers, Annette Funicello, Hale & The Hushabyes and The Blossoms. Brian used these extra-curricular outings to hone his work with session musicians.