Do you measure thawed feeder temp?

[Bogertophis]

...I already had a scented wad of paper in his enclosure...

I'd be very careful about doing that- he might decide it's edible? I know BPs are usually not the ones swallowing towels & other extraneous things that smell right, but I wouldn't take that chance- or at least modify the way you leave scent in his enclosure so he can't possibly swallow it.

Apart from that,