@Dearborn, we don't know each other, but I read the first page of the post and was immediately concerned for you! Burns are no fun whatsoever! So I promptly skipped pages 2 thru 8 and landed here on page 9 - where I'm relieved to see you're doing OK.
And I don't know if anyone else mentioned it, but after hearing from you guys who've had these experiences with propane tanks, I'll say: I'm more convinced of the virtues of Pex than ever! :-)