I think your temps are fine but might turn the heat tape down a tad. 76-81 (inside the cage) has worked like charm for me and I'm maniacal about temp mapping the snake room.
The advice you got for cooling them was accurate in this case and as far as duration, I've got no consistent results because each snake seems to have its own trigger. I pick 30 or 60 days and have an approximately equal success/failure rate with either.
The second clutch animal might have his own feeding clock which is different than the other 2 at least for now. He might become the chow-hound in another year.
Good luck with them training you!
Jeff

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