With all the nitro rumors, concerns, facts out there...has anybody run the .25 with 20%? If not what would be the disadvantage or problems if I did? I can find 20% locally but can't find 30% and the rumors (yes I know they may be rumors but rumors that should be considered) that 30 may become difficult to find in the future are suggesting running something other than 30, and I haven't begun break in yet so a fuel change would make sense.