mob When the muscle strength is larger, less excitation is required to achieve the same amount of contraction. The LOA code understands this, so when you make the muscle 100 times stronger, it excites the muscle 1/100 times as much. You can adjust this by changing zLineOfAction.posSensitivity. Setting that to 100, makes it excite the fiber 100x as much, so you should get about the same amount of excitation you were getting before you increased the zFiber strengthExp.