I have a hard time believing that the snake recovered on the F10 too. That could work in the early stages of an RI, but given the symptoms of this snake I think it is highly unlikely that it would recover from this treatment. If it did, you are very lucky and I would not rely on that type of luck again. A good herp vet was the correct answer in this situation.
BTW, you had many breeders here give you advice and you ignored it.