@free_nirvana, Yes, I got the GC. Interview was pretty straight forward. They'll ask you all of the I-485 questions, so make sure to know the answers. I had all the court documents and everything related already submitted beforehand.

I realize it now - you can tailor your story depending on whether you worked in cash or used social. If in cash, make up a once-off story. If social, I don't know how you would frame it other than being honest and use advice from the lawyer.