When I bought my boat it had a lowrance x51 at the bow and another at the console. Both flush mounted. I removed them and upgraded. I put a Garmin 551C and a 93SV at the console, and another 93SV at the bow. The two 93SV units are linked by an ethernet cable. I also swapped from Motorguide to Minnkota. The first pic is what I started with at the bow after removing the x51. The other pics are the finished product. I did a water test yesterday and couldn't be happier.