If your snake regurg it was trying to eat but sounds like too much from what I read. so why are you switching to asf's? They are sometimes hard to find. unless you are going to breed your own I wouldn't switch. There are pet stores in my area that had them and they had them for awhile. but they don't have them now. something to consider. some of my bp eat asf's. I have some that when you put a soft fur in, nothing, remove it and replace it with a mouse and bam right away, gone. if your snake ate mice before, it will eat them again. glad to hear you're using other methods to measure the temps and using a good thermostat, sounds like your snakes first meal after not eating was too large. good luck don