Did the Rambam ever see the Sefer "HaZohar Hakadosh"?
Here is a link to the Beis Dovid. In Simman Kuf Zayin and in the mafteichos at the end of the sefer he talks about it.
Interesting. [If anybody has other mekoros on the topic please tell me.]
As to the question he talks about at the end of the teshuva - we have an article on the topic here.
A HAPPY Lag Ba'omer!!