Immigration attorney for I-485 (eb2-NIW)

An attorney helped my EB-NIW last year and it was approved. Now, I am current and need to file my adjustment of status next month. I am thinking of using a different lawyer due to cost. Does anyone have experience using a different lawyer for AOS? I don’t know if this is a good step but I currently can’t afford the firm that helped with my I-140 approval.

Any suggestions?