I am going to have to respectfully disagree with the temps you recommended. I am not saying that I am a pro, but to my knowledge, any temps over 88 deg can prove harmful to a BRB. They need a cool side of about 75 degrees with the ambient at about 80 degrees and the warm should be around 85 degrees and should never be allowed to go over 88 degrees. This is the recommended thermal gradient for a BRB that I have knowledge of. If the enclosure is to reach temps as high as 88 degrees, it should not remain there for any extended period of time. Also, if it isn't yet a yearling, humidity should be a little bit higher.
I will not have mine for another few weeks, but this information is based off of the obsessive amount of research I have done on this particular snake over the last several months in preparation of getting one.