I have a question why in the world would BCB let a trailer off their grounds without the insert that covers the steel support on each side of the main roller…..You sell them for $15.00. It cost me $400.00 to repair my keel when I loaded off center and ran my new P2 between the rollers. This occurred on my fourth loading of the boat. I have the inserts now. Still practicing on the loading of this boat. Some other posts have helped alot. Keeping the upper 4 to 6 inches of the outer bunks dry help center the boat.
you need to have a local electronics shop or maybe yourself check the software in both units. they could be operating on different versions which will cause issues. you can download upgrades from lowrance.