Some findings about the heat pad I used:
1. It kept the tank at an acceptable temp for my corn.
2. Was cool enough that I could lift the plastic tank up and immediatley place my hand on it and was able to keep it there without any pain, which would certainley not be hot enough to melt anything.
Nobody here is questioning the safety. If you don't believe it is a fire hazard, call the factory and ask about leaving it on 24/7 for a year. I personally believe the risk is small, but this doesn't matter.
We are saying it is TOO HOT. You've managed to avoid saying what the temps are over and over again....and again...and again. You are saying it is NOT too hot, but you apparently have never checked it. What do you mean that you can't run the test? If you can't afford a $20 non-contact or $15 max-min thermometer, you shouldn't be talking about buying more snakes or building a rack! You need at least one of those items to take care of that animal properly.
I call B.S. on you about it not being hot enough to hurt. What the heck does that mean? Of course you can hold you hand on it. I can hold my hand on my 95F hotspot in my boa cages "indefinitely" without burning myself. If I sat a cornsnake on it for too long, I would be the sole cause of death for that snake.
Soooo, stop avoiding the issue. You say the heating pad is not too hot for the snake. Forget safety - it is irrelevant. I believe it is. I've tested it. When I've done it, cage temps were ~92-93F on low for the "cheap" ones from Wal-Mart. That was under substrate, and the temps varied if it was under a glass, plastic, whatever. TOO HOT.
You say that isn't true now, but you list NOTHING to say you have even tested it!!!! Admit it: you have done NO actual tests to verify the temps, and you are risking your snake's life because of it. Shame on you.
Put up the data or shut up about it. I'm tired of reading your DANGEROUS advice that you make up on the spot. Give some data to prove the NEW heating pads are cooler than the old ones (so cold that they wouldn't be heating pads at all to a normal human!) or shut up. Stop saying "It's cooler because I said so!" You sound like a know-it-all kid.....oh, wait. Never mind.
I'm sorry that I've finally gotten upset enough to sound rude. I shouldn't, but your advice is dangerous. You don't even seem to be able to comprehend that you don't have a clue what you are talking about, and when someone gives you the opportunity to prove your knowledge you crawfish worse than a New Orleans politician, avoid answering the question, and DARE to fuss at me for asking for your evidence!
Admit you have no clue and stop driving everyone else crazy. Here is a thought: everyone with experience keeps telling you to hush up because you are babbling nonsense. Maybe it's you and not everyone else, eh?