Trim Tab size Question

[RUSTYNTABATHA]

I NEED them so i dont have to move the wife and kids around to ballance the boat.. i have a bit of OCD and cnat stand it if the boat is not ridding square... also for the plaining speed.. we high speed troll for wahoo and i want to be able to plain as slow as possible for fuel consuption and white water controll.. i really could have used them this week on our short boat ride in a stiff breeze on the quartering chop to push the bow down on a angle to help with the ride.. with e light 115 on the back it sits high in the water and the tank is under the deck.. i have yet to find out what size tank though... I ordered the Bennett M120 tabs for 484 shipped to my door and cant wait to get tehm installed !!