Preacher
Every time I think that I have seen everything, something like this comes along to prove me wrong. Have to admit that I have never seen this kind of patching and
are you sure it's for M/L's? Sounds like you have some directions as to it's use, so perhaps you could persue it that way. I'd even question how it mics. .....
Years back when I went to "Friendship", someone would show up with something new or different. I always enjoyed that as it gave me ideas of what I could do. There might be some good logic of putting the light side goes to the ball but right now it sure escapes me. It might be acting as a buffer.
Is it possible that you would punch out Bore-Buttons" out of this material??
As best you can, please let us all know what you come up with.
Be Safe !!!