Different airplanes have to be handled somewhat differently. Some planes will harrier just fine without spoilers, some will want to "rock" badly. I would try it first with no spoilers. A simple no thrills way to start a hasrrier is to idle back, let the plane slowdown start feeding in full up elevator. You might find it necassary to hold a little right aileron to keep the plane from rocking. Use the rudder to stear the plane. You might find it necassary to add spoilers mixed with the elavator, to stop the rocking. Throttle is also important, to much throttle and the plane will want to flip over backwards. Start high and practice.