Both da Rock and RMH have given you some good advice. So I'll only add this:

Most people think of Center of Gravity as strictly a pitch issue. But if you think of the CG as "the point about which the airplane pivots in all axes", then you will see that CG can be just as important in yaw as it is in pitch. If you have a lack of vertical area in the back, or an abundance of area in the front (you have both) then the aft CG limit for yaw may well be more critical than the aft CG limit for pitch.

So, just as the previous two posters have suggested, try moving the CG forward. I think you will see a big improvement not only in yaw, but also in the tendency to bounce on landing.

Dick