Is [link=http://hobbypeople.net/gallery/128290.asp]this[/link] the plane you mean? If so, there are no control linkages to adjust, because it is steered with differential thrust instead of movable surfaces. from looking up the manual on line, there aren't any trim sliders on the transmitter case either. The way to trim out a turn is to bend the rudder (vertical tail surface) opposite the turning direction. You say the plane is turning to the left, so carefully bend the rudder to the right slightly, launch the plane, and see if it tracks straight. If it still turns left, bend the rudder to the right a bit more, and if it now turns right, bend the rudder back left a little. Continue until the plane tracks fairly straight without turning input. Another possible cause: if the two motors aren't turning the same speed, ie the right motor is turning faster than the left, when you apply power, it could cause the problem you describe. If this is the case, there is not a lot you can easily do to correct it, and the best advice would be to try to return the plane as defective. I would advise you eliminate this possibility first and then proceed to try trimming it out as described above. I hope I've been of some help.