An interesting Star Wars story I heard today

My co-worker John used to work in Hollywood in the late 80s. He had a friend that was a model maker and told him about a particular gig he did at Lucasfilm. They were putting together a variety of creatures for George to pick from for the scene at Jabba's palace. They were running out of time and decided to slap some stuff together that George would never go for so they'd get a couple extra days to come up with something better. The day comes, they put out the full spread of options...and to their surprise George picks three of their substandard designs to be Jabba's house band. That's why Max Rebo is a blue elephant.