I have a 21' Sea Boss CC with Johnson 175 2 stroke.
Fairly light boat (2200lbs).
No doubt need tabs.
Boat lists to port even with 2 people on starboard side (wife and son) on plane (and certainly with a quarteing sea).
I would also like to bring the bow down without having to trim my egnine al the way down, but most definitly need it to even out side to side (and not worry about where people wnt to sit or stand under power.
I have been on boats for 30 years and know the difference trim tabs make and my boat needs them for sure
My father has had them on all his boats and I can't get mine to run the way I want like I can his in the differing sea conditions (and weight loads).
Oh yes, I have seastar hydrualic steering on the boat.