I'm always the other side of the coin in this discussion.
Brendon, you didn't say whether you had supplemental heat, or anything about your cooling process....but I've never had an RI in BPs that I associated with "normal" temp cycling. In years past, I took care of rescues that had been kept with no heat for months (not exposed to extreme temps), and they didn't have RI. I've cycled BPs with boas, and other types of pythons, without a problem.
Temp cycling may not be necessary with BPs, but I think most of us allow natural seasonal decreases...and that has proven to be sufficient. For those that WANT to temp cycle, it can be done safely - BUT, if there are already issues (regardless of your awareness of them) they are likely to manifest during a cooling period.
IMO, humidity issues are of greater concern than the temps traditionally recommended for temp cycling. (70 degrees is below the normal recommendation, but I've let BPs get that cool because I was cycling other animals.) When it comes to temp cycling, there are many opinions on the "right way" - some eliminate the heat entirely; some leave cage heat the same while lowering room temp; some reduce cage heat without lowering room temp; some favor day/night temp variance;, and the list goes on...