I hope he switches for you!
Bailey is a 103g bumblebee that's roughly 7 weeks old. She's eaten 2 live hoppers for me and now the F/T hopper. Once she gets another 100g on her, I'll switch her to rats. I've only had her about 2 weeks so these are great milestones for me! I hope her transition to rats goes just as well as her transition to F/T.