Hughes Autoformer power booster and surge protector

Just a reminder if the surge protecter is after the booster it is not protected. I had a franks booster that served me well for years until a transformer blew at my local thousand trails and it fried both my circuit boards at a cost of 400.00 just for the boards and not labor. I now have a nice heavy paperweight cause I can not afford to get it repaired and at that cost I may well just get a new one, but at least it save my trailer.