Snake rack temps?

I have purchased several balls from different breeders and I have been told to keep them at different temps. I was wondering what you guys think about temps. I was thinking about temps as it relates to balls putting on weight. The breeder who keeps his temps at 85 degrees balls put on weight fast and the breeder who keeps his temps at 90 put on weight slower. These temps are for the basking spots with the heat tape being 5 degrees above the basking area in the tubs.

I keep mine from 88 to 90 basking spot and 80 to 82 air temp. plus they are in tubs so they have a colder side also. what I've been told about temps. If too hot can burn the snake, the snake will metabolized his food too fast and not get as much out of it. plus other things at that temp. Too cold of a basking spot can bring on health problems, the rodent may not be completely digested or not at all. the rodent will sometimes rot in the stomach of the snake. the snake can go off feed and other things. I find the temps I have with a control temp and humidity snake room works well for me. At breeding time I lower the temps to about 76 air temp and drop the basking spot 1 or 2 degress max, I don't have a night drop, my temps stay steady to avoid RI's and this works for me. so I stick with it.