For the skirt morph, if you wanted the right leg to go no further than 0.5 - no matter what, you cannot do this and have the left be able to take it to a total of 1.0. If the right went to 120 degrees, it would take the morph to ~0.67. But, no matter how far you took the left, the morph would stop at 1.0, if this is the max. You can set the right to go no further than 0.5 - if - you put two copies of the morph on the figure - slave one to the right thigh with a max of 0.5 and the other slaved to the left at 0.5 max.