JDL; sometimes you just can't win. If it twist out then you can drill a hole in it and try to getit out without boogering up the threads.
I would suggest taking it to a mechanic friend or shop and see if someone will get it out for you......otherwise, if it twist out then you may as well ante up for a new one....if you have to have to have a new one count me in for $5 toward it and call it a Christmas present. Let me know how you make out.