I'm 100% sure it was a dirty reg seat as you state it was leaking out of the reg which the only place it can leak is out of the screw at the end where you gas it up becuase Dan designed it that way unless you do something horrible.
You did not need to replace all the reg internals and there not crap regs. You had one bad experience so the reg is crap, that's the stupid statement a newbie makes.
As Rouge Factor said you bought an EXCELLENT tank and the only thing that was wrong was a dirty reg seat.
If your still not satisified I'll personally fix it for you. I am a certified AA tech by the owner himself and can completely disasemble any reg they have ever made and put it back together in a matter of minutes and have it work flawlessly.
Send it to Air America if your not happy, just please do not bash the product and give it a bad name when me and you as do many others here know that it's a quality product and you had a bad experience. Sorry if this comes off as a rant but it burns me to see people post like this when they have never even owned one of the products before and have one bad experience, especially with a company that I know, trust, and am good friends with the owner/inventer.