My biggest mistake was using those horrible heat rocks inside the enclosure. I have no idea how none of my snakes were burned or cooked.
Of course, back then Google and forums like this didn't even exist. So we just kinda read some books and winged it.
Not to break any stones here, but I have no idea how people can "resrarch" animals these days and still not know that cohabbing is a horrible idea (or any number of newbie mistakes, lack of thermostat, feeding pinkies, etc...etc...etc...). I just googled it and found several answers in 2 minutes. All saying it's a bad idea.