Not a MK guy but isnt the I pilot Terrova a gps unit? if it is, it would be a big upgrade no matter what brand graph you have. I run a Lowrance HDS units with a Moto guide XI5 and love the set up, it gives me many options, trolling at a set speed, anchor lock, key fob etc.... with the right stuff the boat will drive it self to stored waypoints with the help of the Lowrance units.