What about the semi-rigid nylon hose that is sold as suitable for just about everything?
Robin
Edit - good article here .
http://www.groups.tr-register.co.uk/...ol-update.html
It seems that just about everything is affected by it (Including nylon!). But - on the practical side it seems we are already using petrol with 5% ethanol and I haven't had any problems with the Sportster which has now been on the road over 3 years. So why should E10 (10%) be that much worse? If it is just twice as bad then perhaps in practice there isn't a big problem?