Quoted from YeOldPinPlayer:If it were my game I'd want clarification from Stern rather than an assumption from a helpful Pinsider with no skin in the game.
If he did brick a node board or three would you be willing to pay for new ones and get them to him?
The guy is asking if he can run a newer version of software (1.08), then go back to the version he is running now (1.05). The answer is yes. People do it all the time. It really doesn't matter what node boards he has. He knows 1.05 is compatible with his hardware. Now, if he was asking if he could run something older, say version 1.03, that is a completely different question. Then he would have to worry about incompatible node board firmware bricking new boards.
But yeah, I'm just sharing some logic and my experience. No warranty implied.