Ok I kind of started these questions on the sticky and really never got a response. I get interference on 2d only on my 597, di seems fine. I get interference when I step on the tm but not always, some power settings are much worse than others. I tried the grounding batteries thing with no help so I removed it. I have two rf chokes on the trolling motor power wire and two on the graph power cord and I put a piece of rubber surrounding the tm so the transducer or hose clamp touch no metal on the motor. I’ve almost quit using 2d completely because of this, what am I missing? Thanks