We shouldn't let him go at all for the following reasons:
1. He does the one percenters Mannering used to do.
2. Has great defensive reads and saves a lot of tries over the season, like Mannering did.
3. Is one of the few locals to kick on.
4. Has the heart of a champion. He leaves nothing in the tank. Forces his way over the line often when something is needed.
5. All the above is rare in one player. It balances the team well.