I had an older flat top DX Teebird that was great for a low line straight shot. Lost it, tried to replace it. All of the newer DX Teebirds I've come across are domey and don't fly the same. They'll go straight, but won't stay as low when I need the tunnel shot in the woods. I got an ESP Surge in a trade that's nice and flat that's now my tunnel shot disc. Not saying a Surge is the answer, but something that is not too domey seems to hold the "laser" line better.