your adding a trolling motor with the I-pilot add on... GREAT choice..
the 12V power drive I-pilot will have 2 options for control.. either the foot control OR the remote not both at the same time.. IF you want both then you need to go to a Terrova they do have a 12V option model so both controls would be available.
Depending on your style of fishing would determine which one would be best for you. I have a Terrova when trolling I love the hand held remote for cruise control option. When casting shorelines and weed edges the foot control is best for me as I don't constantly need to drop a hand to control the trolling motor.
Spot lock is a GREAT accessory to the trolling motor and can be accessed with either controller
For the extra buck a Terrova is the best value in my opinion.
The aluminum checker plate add will be plenty good for the mounting.
GOOD LUCK... you will love it.