I managed to put in a bunch of morphs for the cuffs including some fit morphs, pirate morphs, flare, etc.  But, I couldn't get the "notch" morph to conform correctly in all poses.  I was suspecting that would be the case.  Because of where the points are in the original, they want to continue translating the same way, their new location in the morph doesn't seem to be recalculated for the deformer. 

So, I'll leave the piritish like morph in the regular cuffs and make a special "Pirate" cuff with a better notch and perhaps a bit more stylized.  The other boots can have a notch put in them if they add a transmap.