When I was doing fun fly events and we were flying on a hard surface if someone was using a trike we knew right away who was going to win any of the ground events. If we were on a grass or rough surface we knew who was going to come in last. At my first local field you couldn't use a trike so every plane there was a TD. That may be why I have always used the TD?? Where I fly now they are great. I have my one little pattern plane and a trainer with trike. They are easy to use but I don't have any trouble keeping a TD straight, I'm pretty sure they are going to pull left so as soon as I see that I just hit a little rudder and hold it there, no stick moving. Just give it what it needs and stay there.