I still use a handheld garmin to mark my spots. I hold the garmin directly over the top when I mark it. I'm going to try to put the Lowrance as close to the Xi5 as possible, but it will be a few feet from it. As long as the Garmin and Lowrance are using the same map datum, I'm thinking it should get me pretty close. I agree about having to buy separate components for the Lowrance. It starts adding up having to buy all of that. I use a free program called easyGPS to edit my waypoints. I can upload the waypoints to my computer and then delete them from my Garmin. I can then rename the waypoints and copy only the ones I want to keep back to my Garmin. I think I will be able to do the same thing with the Lowrance with that program. The trolling motor and Lowrance is supposed to be here Friday, so hopefully I get to try it all out this weekend.