Well I'm feeling particularly dim. Despite having seen both the Western and the Japanese original and having progressed to Grade II on the violin as a child, I cannot make any sense of the clashing letters. Obviously one lot look like the "notes" referred to by the extra letters, but I can't make any coherent phrase from the remainder. I've checked all the principals involved with both films and none are 4,8 so feel sure the village protecting gunslingers are a red herring. I've also Googled famous groups of 7, deadly sins, continents, dwarfs... you name it, but that too has led to nothing.
I had hoped looking with fresh eyes this morning would help but, alas, no.
I'm off to take my canine guest out for a walk - maybe it will help clear the cobwebs away!