Trim Tab?

I finally got to take my boat to some water where I could open it up. It is a small (14'X43") aluminum bass boat, decks in front and back with console steering. It has a 35hp Merc ('83). It ran like a bat outta' Torment ;D! Had to move the motor in a notch to keep the bow down. It planed out nicely (for it's size) and just flat out flew! I had the trim tab set at 12:00 (looking to the stern) and then changed it to about 1:00 trying to correct the pull. It helped a little, just not enough. When I redid it, I moved the batteries to the port side to try and offset my weight better. It still sets heavy to my side. With it being a small boat, do I need to just get used to the pull? Real question I guess is about how much can you alter the trim tab?

skillet