I can't corroborate that statement, as I don't know the specifics of the die-casting processing and alloys that were used. However, I do know that the ends of the tubes were flared to give some extra insurance against being pulled out of the lugs. The ends of the tubes were capped out of necessity, to prevent the molten aluminum from flowing into the tubes, but the caps also prevented the flared end from collapsing and allowing the tube to be pulled out.

I should also have mentioned that the seat post used an expander bolt, as the the low ductility of the seat lug prevented the use of a standard binder bolt.


Well, it was supposedly developed for highly corrosive environments, such as the seashore. So, if you find one, let us know how the periscope and propellor modifications work out.
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