It's cool this thread has inspired some of you guys
Silverbear that's one of the great things about soldering or brazing...you can easily join dissimilar metals like brass to steel or copper for instance.
Doc that tank is bullet proof...literally
I have that same rear rack on my daily rider..I'm interested in seeing how you fasten it down.
That's what I'm working on at the moment...testing out some mounting methods with a test can. I've soldered an L bracket in a slit cut with a thin cutoff wheel. I've made a couple holes in the tester and will solder in a couple bolts too and then try ripping the things outs and beating on them. The easy way would be to use big hose clamps but I don't like the look of those things so I'm trying for something cleaner looking.