I switched blades in the grips. It does make a difference on these blades. I also tightened the grips as you suggested. I can get them to track at slow speeds. Sometimes at higher speeds but then it goes out of track once you start flying around. I'm now trying to add some stickers on the leading edge out near the tips to increase the weight. Maybe make them more stable. Charging up now for another test tonight.

The blades weigh the same, 4.3 ounces each (before stickers were added). The CG is in the same position along the length for both blades. It is so close it is scary. I don't have a balancer for checking CG along the cord. My guess is that it is pretty far back. Maybe this T-rex 600 electric heli just isn't stiff enough to handle them.

Terry