Being a new homeowner and amatuer DIYer, I am having a dilemma while trying to remove a 15 year old shower drain. It is rusted and corroded, I have managed to loosen it and it turns somewhat freely. But, I have been turning it for a LONG time with no progress. Looking down into the (nasty) drain, I noticed what looks like the pipe the drain is in also turns with the drain itself. I have very limited crawl space underneath the house, so that is probably not an option for myself. Any suggestions?

Also, thank you for the wisdom in these forums, they've helped me a lot in the past!