Obe Wan has taught me well.
I was a little bit worried about the high profile of the windshield wiper blades, but as it turns out, they role one way or the other in your palm and take the stress off of the glue. I was concerned that the stress of wielding the hilt would pull the blades off, but the contact area sees virtually no stress. It does not feel too bad. It would be better if the pressure was spread more evenly across the hand. My next iteration will have stacked O-rings.