I can't seem to control my vehicle very well. Basic vehicle: OKTO2 with MK16 chute on top, FL-T400 tank and LV-T30 Centers of mass, thrust, and lift all look good (as far as I know) control input test on pad works, yaw, roll, and pitch indicators show full range of movement. My tests with solid rockets worked fine, no problems at all. Full thrust takeoff, at about 1800 meters, this thing start to tip right sharply, and no amount of opposite yaw input has any effect whatsoever on correcting it. At 1/3 throttle, I can control the craft until the fuel runs out, but any higher throttle than that and it quickly goes out of control. Is it so squirrely just because there is so much thrust for a light vehicle? As I understand it, it's more efficient to be full throttle for a while after takeoff, but perhaps that's not the case here?