Ok, so you have a few more day's till he completes his process. Like before, I would just let him be. Once, he is fresh and brand new I would then offer the mouse.
So, since he takes so long to even strike? Do you sit there with him or do you walk away and check up on him?
For, me I wouldn't just sit there and stare at any of my snakes for 2 hour's boring lol. And, I definately wouldn't leave a live mouse in with my snake for more then 15 min's. I would just try again in a few day's.