Emailing a professor for points on an exam when you want a recommendation from the professor
Let it go.

You discussed this before, he made his arguments and it is unlikely that he will change his mind. It isn't only up to you to make a good argument for the points, but the professor himself will have judged the points again when you discussed them and will now be convinced that the points are fair.

Begging even more for the points will probably not get you any more points, but may annoy the professor, e.g, because you already discussed it and you are still not satisfied after he told you the final outcome. He has neither the time to discuss this again and again, nor he will consider that he was wrong the first two times (the first assignment, then your previous discussion).