Alex, I only use RHPs with my arboreals now - thrasops and spilotes.
I zip tie the t-stat probe to a the prime basking branch and I don't use a fail safe.
When I has womas and blackheaded pythons, I had a heck of a time with the snakes laying down on top of the probes. On the fail safe setup for those cages, I would place the probe halfway up the side of the cage and zip it to the wall. I would set it for the max ambient temp on the hot side of the cage.