To leave feedback for another member, click on the user's profile, then find their feedback rating.
Click on the bolded feedback number , and it will take you to a page showing their feedback ratings. on the left hand side of the box that appears, you'll find a link entitled "Submit Feedback for ____________". Click on this, and follow the instructions.
understand that you will need to have the URL of the Talkbass FS thread which advertised the item you are giving feedback for - we do this to prevent "false feedback", which was getting to be a problem before this rule was instituted.