The flite streak is a combat/stunt plane. I really wouldnt even consider adding tail weight to a streak if trying to fly the stunt pattern. If I were flying combat,then yes. I have one with a OS LA 25 with muffler. It balances about an inch from the L.E. Very smooth.

Can you adjust the widtht of your line spacing at your handle? If your line spacing is too far apart your plane will react too quick. Put the lines closer together it will smooth it out.