I tried sourcing hi press hose for the SDS, i spoke to lames at parrafield and they suggested pirtec hose , CBC stock a similar orange hose , the specs are on pirtecs web site . Seems to be the stuff they use in motor racing , .i think ill go for the teflon hose when time to replace .
Pirtec wouldn't recommend avgas but said ethanol was ok in their product .
It seems to go hard if you let it dry out ,
Mike