136 grams sounds good for that age so you should be ok on that front. I would wait 5 days from the last time that you fed him now that he is in the new enclosure and try the F/T again. If he refuses I would try live.

As far as dealing with adult BP's vs juveniles I have found that my adults are hands down much pickier and generally more of a pain in the a&* when it comes to feeding.. The juveniles will typically eat every single time.. Right now I think its all about having him in the proper sized cage and go from there..

Good luck.. Keep us updated...