Almost all the small Pipers you will be on the forward limit of the CG with two on board such as training flights. The stabilator would run out of authority without significant trim close to touch down speed resulting in flat landings or the inability to stall the aircraft straight and level. An easy fix is to put 20kg or so in the baggage compartment which moved the CG rearward and made for much easier landings, including being able to hold the nosewheel off the ground. Most Seminole you actually go out of the forward limit with two on board and a decent amount of fuel. Limit the fuel and use rear ballast and it flies a lot more pleasantly.