By the time of his return to Anfield in the summer of 2008 Carson had slowly steered off course, not helped by an error-prone reputation, and his subsequent £3.25million transfer to The Hawthorns ended in misery 10 months later as Albion were relegated.
But he is back in the big time and asked whether he has unfinished business, the keeper told Press Association Sport: "Yes, definitely. Most of the football that I've played in my career has been in the Premier League and everyone wants to play there.
"I want to try and cement this club as a Premier League side and cement myself as a Premier League goalkeeper for the next six to 10 years.
"We're one of the clubs that have this yo-yo tag and, as a group of players, we want to play at the highest level and that's the Premier League.
"So we want to try to end this tag."