Thank you so much, Apollo! You guys really are THE BEST!!!
Apologies to the OP JediDunn for the slight hijack; but I really enjoyed hearing from everyone here and in messages.
I was able to flatten two sides of the double-threaded brass connector with the two o-rings and the gas tube with my dremel, and then I was able to use a box wrench to break it free from the firing chamber. My calcium carbide was still in good shape, not sure why, and so I did a test fire after cleaning the filter and so far so good, no leaks for me, but I will continue watching this thread for more info and insight. Best of luck to you, JediDunn!
Cheers!
cdw