The switch is like DPM on an MOVFR. If the controller has no input for it, don’t use it. Did they originally have Mac operators? Wondering why they’d choose them for a mod. I think they’re great operators, especially with that new LCD board. But since they don’t have a throw adjustment they don’t adapt very well. All you can do is position the operator so the door is full closed with the arm straight, then the open just is where it is. If it isn’t near harmonic full open the spirator will pull the doors off the limit.