Odd with Lockers at 6.
The only reasons I can think of is that he played 6 at schools and amateur level. Though that is a very long time ago.
He must have trained well at 6 and MM doesn't want to lose Sam's threat from full back.
The key to me still is to play four props. He's going with four so we should more than match HKR forwards although Galea is always a threat.
Beat the HKR pack and the game is ours no matter who plays 6.