RE: Neoprene, Tygon, and Viton UV Resistance
VP Racing Fuels at about $18.00 a gallon. What a deal. Easier and much cheaper to use Tygon and replace the lines once every year or so. Viton does not seem to be affected by minor amounts of ethanol. One should be checking thier fuel systems annually. If replacing a little plumbing once every year or two is an intolerable expense they need a different hobby. Doesn't matter how many planes they have. It runs hand in hand with paying $5.00 for a plug ecery couple of years. Some find plugs too expensive, yet they would blow a glow plug or two every week or so.
Sorry, I just find the task of replacing consumable parts periodically to be part of the hobby experience and not something to complain about.