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First, the final F' should be F. Next, I notice (by doing the inverse) that this algorithm does not correspond to your diagram (OLL42), but to OLL44 if you put (y') in front of the algorithm.

Good point, though I think it's not most people can correct that last turn while trying the alg (i.e. I don't think this quite warrants a post, unless maybe you went through all of them, and found that only this one was incorrect).

Next, I notice (by doing the inverse) that this algorithm does not correspond to your diagram (OLL42), but to OLL44 if you put (y') in front of the algorithm.

I started with the cube in position OLL42, performed the alg as it was written, but it totally failed to point everything upward. So I started with a solved cube and intended to do the inverse of L' U' L U' L' U2 L F' L' U' L U F by reading backward, replacing each twist by its anti-twist. I apologize, I must have goofed! But the result of the inverse is still a rotated diagram of OLL42 requiring (y2) in front of the algorithm. Without the (y2) newbies who see this alg (or other algs for a rotated diagram) will complain. I would love to see this OLL collection (updated in post #1) be accurate and useful for both new and experienced cubers.