Same here on my end. I started out with an older motorguide trolling motor and tried every suggestion known to man, including the ferrite rings, ground wires, cable management, chokes etc., etc. I gave up and bought a new trolling motor and the RFI only got worse. I spent days, weeks and countless hours doing trial and error to no avail. Nothing worked and I have been dealing with this for years now. It's extremely frustrating to spend thousands of dollars on equipment that doesn't work as it should. I still think HB and the other manufacturers should be the ones to figure out how to solve this issue. I'd gladly pay a little more for the equipment if it actually worked as advertised. The onus should not be on us the end customer to try to figure out how to make their product work as advertised.