I was wrong, it's not a wobble, it's more of a bob. The tail is kinda bobing up and down, so I put the stock plastic rotor head back on and then it acted just fine. I put the steal head back on makeing sure the blades were seated on it good and tightened evenly and the head is on the center hub evenly and I got the same results. I'll keep messing with it but now I'm waiting for battery to charge.