The wood riser is going to be back mount only, so you can choose wood or alloy. The belly mount is alloy only to keep the riser stiff enough for the limbs. VtMtnMan and I spent the day shooting the waves on the back mount riser yesterday. We were shooting AD Big Games on it with 100 grain points. It made a 50@28 bow. The back mount is the way to go for 28" and under draws for serious speed. It has 3" more power-stroke and is very efficient for medium to short draws. The belly mount shines for longer draws. Either will work for either draw, but they are more efficient for different draw lengths.