Just to clarify. The fuel cell bladder is whats rated for all fuel compatibility. (600 series fluro cell.) But you choose the foam which suits your requirements. Either gas (petrol) or alcohol (methanol)

I will actually be chopping a fair bit more foam out of the cell in order to make space for the Radium FCST. As that will be alot more bulky than the original lid.

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Doing it for all the wagons out there