Here is my answer to everybody's request for a Luna/Titan Variant. Meet the U.S.S.Apollo. She is a Lunar class cruiser, a close cousin to the Luna. Here warp nacelles are above instead of below the saucer. She has a dedicated weapons platform where the Luna has the sensor pod. It is removable. I have also swapped out the impulse deck with a new one, also not the third impulse engine, this ship does separate in to multi-vector mode. See the I.S.S Titan for what that may look like.