You're in great company digger. John Lennon once wrote about the work that he had Recorded with the Beatles, adding that there was so much he would redo if he hadn't the chance. He talked about his 'Twist and Shout' vocal delivery saying that he had performed it better when playing live and that when when he played the studio recording, he could tell that it was a young guy, frantically trying to do his best. Good luck with your album - a great achievement! :-)
Paul