I have just bilt up my new racer and it has a 1 1/8 carbon steerer. I have a Dedda Big Log stem that can be flipped for different angles etc... I like the flat angle better than the nose up. So the stem is roughly parrellel to the ground. But in order to have the bars at the correct height I have 5 cm of spacers under it. I've been told by some that 25mm or 40mm is max height for that. So I can flip the stem over lower spacers and get more height but I really like the feel of the flatter setting. Any thoughts on that.