Delay in dvar torah this week

I don't think I am going to get a chance to finish writing a dvar torah before shabbos this week.  but I'll just put up a follow-up to what I wrote last week about kalev's tefilah and praying to the dead.  The gemara in taanis brings down the practice to go to a beis hakevaros on a fast day.  Tosfos seems to assume that the purpose of this visit is to ask the dead to intercede on our behalf with Hashem.  In a similar vein, the ran in his eighth derasha  explains that kivrei tzaddikim have a "shefa of kedusha" about them that we try to tap into when we pray there.  The Rambam, in hilchos taanis clearly disagrees: אחר שמתפללין יוצאין כל העם לבית הקברות ובוכין ומתחננים שם. כלומר הרי אתם מתים כאלו אם לא תשובו מדרכיכם  - we dont go to the cemetery to daven to dead, nor to tap into their kedusha.  Rather, it is to remind ourselves of our mortality to motivate teshuva, al derech the gemara in the beginning of brachos, yachshov liyom hamisah.  While this is not an absolute proof, this is further evidence that the rambam would assur davenin to the dead.  This point is strengthened by the fact that the rambam in hilchos aveilus writes, ולא יפנה אדם לבקר הקברות - in general a person shouldnt go to a cemetery.  while the nosei keilim debate as to what exactly the rambam means (since we do have the minhag to go at various times to the cemetery), one explanation would be that the rambam discourages cemetery visiting because he was afraid of people davening to the dead.  This still requires further research.