Has anyone out there switched from a MK Maxxum to PD V2? I was wondering if the front 4 holes line up, or am I going to have to make 4 new ones. Also, which PD V2? I don't have all the money in the world, but I don't want to switch out down the road either. Is the auto, co, and I worth the money? Also, is the built in ducer worth the extra $? Will it work with a Lowrance 510C? Thanks.