Cool. Good stuff; thanks for the info!

Also, here's an interesting article on fuel tanks from Alfred Scott's
Sequoia Aircraft site:

http://www.seqair.com/skunkworks/Fue.../Problems.html

Note that it's mostly about fairly large, fairly complicated fuel
tanks welded up from untempered aluminum. But the stuff about the
torture test should be of interest to folks who are designing their
own tanks.

Thanks again, and best regards to all

Bob K.
http://www.hpaircraft.com/hp-24