So, during landing, stub is not doing anything for us at all. 100 % of down pressure is providing by elevator. Stub is more or less level at that point. From what I understand, in level flight stub is providing 100 % of down pressure to counter balance forward CG, wing moment and high mounted engine moment. Elevator is not doing anything if trim is in neutral position. If above statement correct, here is my question: let's assume that airplane designed perfectly and 10° on stabilizer really needed at 100% power and most forward CG situation. If I decide to prove this to myself and change negative angle on stabilizer by moving leading edge up by 2° or so = in the exactly the same situation I will need to dial more trim or apply back pressure on the stick to stay in level flight. Then after landing I will need to put everything back together. Where is danger by doing so? What can potentially happen? Is there something I don't see?