I have an early BR1 Max (Product Code MAX-BR1-LTE-E-T). I had 2, but 1 just died and I would like replace it with a BR1 Mini. I will put one in production and keep the other on a shelf. (I am in east Africa where replacements are challenge.) Are the config files compatible? If my prod unit goes down, I want to be able to restore its config to the other and be up without having to dink around with the configuration.