Below are two plots showing the ratio of JP1 events to BHT3_coin events per run (the horizontal axis is run number, zero suppressed and with gaps removed).  Early fluctuations are probably because the triggers weren't finalized.  There are a few areas that concern me, but most of the deviations seem to be where the BHT3 rate drops low instead of high.  More likely these represent over-firing of the JP1 trigger, though I've not yet explored the shift log in detail.

The later section, with the exception of a few brief spikes, seems very uniform, and validates the uniformity of the BHT3_coin in that area.

And zooming in to highlight the shape (it looks so flat above):