Well, the results are in! If you want your Laser 3D to be more responsive, have less coupling in knife edge, faster roll rate, and better hi alpha, then leave the tips off!!! I can't believe the difference! It will even do a blender after a fashion now! Elevators lock right in, with no wobble at all, harriers are so much less work, they're almost trivial now. It's not quite as stable as it was with the tips on, and lands a little bit faster, but that's not really an issue. I'm running an OS 50SX in it, and it's about 4 pounds 10 ounces now. We're at almost 4000 feet here, so performance is not nearly as good as sea level, however, the colder air today made it a bit better than usual. It hovered today at about 1/3 throttle, and full throttle from a hover starts it accelerating quite quickly. Full throttle climbs quickly go faster than I want the plane to go. In other words, I'm VERY happy with the power I have. I use an APC 12.25 X 3.75 prop on it.