At 11:58 PM 9/21/2012, neil n wrote:
>electrochemical, or whatever it's called, reaction with the engine case
>which is Magnesium something er other.

Sorry to bring you (partway) down the electronegativity scale.  Our
WBX cases are made of plain old aluminum that isn't flammable unless
it's ground up very fine.  Put together with plain old steel
bolts...you knew that part.  It's the Luftboxers that have the fancy engine.

Yrs,
d