This version requires a few negatives. On the website, they are already on the negatives embedded file, but in case you don't use them in the workflow, add (crank it up if necessary): "fewer fingers:1.3, missing fingers:1.3, fewer digits:1.3, extra digits:1.4, extra fingers:1.4, inaccurate hands:1.2, inaccurate fingers:1.3, weird teeth, cross eyed:1.4, fused fingers, merged fingers".
I know it seems excessive, but seriously... hands, they have been all over the place, so to make sure you have a nice generation, I recommend including them, and if you don't want long nails, you may have to tell that too. Since, even with the prompt, it can be a bit stubborn.

updates: possible variations of the pose, if you have any suggestions, feel free to contact me =]