Yes I have read the same thing you're talking about with the boat industry. It does seem to be a much larger problem than it is with cars. My whole fuel system is E85 compatible so I won't have the worry with softening rubber. I'm even getting my fuel cell anodized inside and out to prevent any corrosion issues that could develop. I guess maybe the best thing to do is to use up as much fuel in the tank as possible before refilling and refill the tank maybe more frequently than one would do with regular gas.