NEVER talk to the FBI for any reason under any circumstances. They are liars and crooks. Nothing good ever comes from talking to them.
From what I understand, they won't talk with you if you have recording devices present. That is because everything they do is fraud. If I were on a jury, and the court was presented 302s for evidence, I'd treat them as less valuable than hearsay.
The FBI needs to change the way it conducts these 'interviews'. President Trump could issue an executive order today to require audio/video recording equipment to be used in these sessions. Who could possibly object to that who wasn't interested in perpetuating fraud?
I would dismiss all FBI testimony since we know what liars they are. Heck, the FBI crime lab, itself, is a crime scene.