Unfolded, attached to a tractor, the left side of the harvester is off the ground with the corn header. Folded it sits fine. Changed the center of mass a bit, unfold, unattached a few times and finally got it to sit right.
Not sure if what i changed fixed it, or just folding it and unattaching it worked. Seemed like the attacher joint/angle on tractors was too high. But here is what i used. <component mass="3106" solverIterationCount="10" centerOfMass="1 1.2 1.923"/><component mass="19106" solverIterationCount="10" centerOfMass="1 1.2 -0.467"/>