I sure am glad I stayed out of the bulk of this topic. Anyhoo...
Glad to hear the little Fella is eating for you! These guys readily adapt to captivity, so if you wanted a new pet and a chance to get into keeping kings...this is the chance. Keep him the same as your cornsnakes, and you'll be just fine.
I did want to address something...
Rattlesnakes, coachwhips, racers, whipsnakes, and Indigo snakes are all considered "immune" to pit viper venom. I don't know for sure, but I wouldn't test the theory that this applied to ALL vipers, or even all pit vipers, because venom components may vary from region to region. It certainly wouldn't apply to Elapid venom, such as Coral snakes or cobras.
I also wouldn't test the theory that they are completely immune, meaning they receive no damage from envenomation. It seems that an overwhelming amount of venom would be damaging, even if not life-threatening.
Besides that, rattlesnakes have large fangs. Even if the venom itself is no more effective than clean water to them, inch-long puncture wounds can cause severe damage to bones, musculature, nerves, and vital organs.
I will say that I have no problem with someone that feeds stillborn or f/t kinked hatchlings to ophiophagus snakes. Someone that breeds king cobras or coral snakes might find cornsnakes an easy-to-breed food source for commonly difficult captive species, just like we find lab rodents an easy-to-breed food source.
But I do take strong issue with anyone gaining pleasure or entertainment value from the needless suffering of any animal. Hunt, kill, and feed yourself or your pets with a sense of humanity, and you're OK in my book, regardless of your specific choices. Take pride or pleasure in torture, and we have issues...
My $.02, which you must have assumed you'd get...
