Tom,
I think Boelen's would be a prime candidate for the outdoor regime you ran the Diamond's through. Even though Boelen's are virtually equatorial, the altitude differential gives their climate much similar seasonal temperature dynamics to most of the year in higher latitude Florida. Both species are exposed to winter night lows well down into the 50's on a regular basis in their natural environs. I think this heavy night-time cooling and daily temperature climb will be imperative to breeding Boelen's in captivity. I've taken some other species of temperate type climate boids down into the 50's at night with no problems as long as you have a daily warming period. Definitely let me know how it goes with this project. Thanks,

Kelly