Dear Rabbi Simon
May I please have your opinion on the single daled vs double daled in the shel Rosh? In my research this appears to be an element on which opinions are near 50/50. Thank you.
It is certainly true that there are divergent minhagim in this. The preferred option is the single dalet, as the so-called “double dalet” is based on Kabbalistic sources which seem to diverge from (or expand upon?) the classic halakhah. I am not saying that the double-dalet is not legitimate for those who have such a minhag, however in the first instance I would recommend the classic “single-dalet” model.
Rabbi Rashi Simon