Thanks for all the good advice!

I think I will try feeding him in the cage. I'm using the newspaper-chunk recycled substrate, so I hope it won't be a problem if he gets a bit in him when eating... or maybe I'll put the mouse on a little chunk of cardboard?

I noticed a trend of heating strategies; so it is important to warm the mouse? I wasn't sure if BPs had a sophisticated heat sense like venomous snakes often do, so I was more concerned with getting it warmed up in general.

When I place the mouse in his enclosure, should it be in the hot spot, in the middle, to one side or maybe I ought to just experiment...

Seems to me that the hot spot might be too hot.