Dear James,

Chapter 5 of the Kālacakra-tantra is the hardest chapter, as you well know, since you translated it. While it is always necessary to compare "the" Tibetan translation when editing or proofreading a Sanskrit text such as this one, here two Tibetan translations must be compared. So it will take some time.

As you probably know, the Tibetan translation of the Kālacakra-tantra made by Somanātha and 'Bro lotsawa as revised by Shong ston is found in the Lithang, Narthang, Der-ge, Co-ne, Urga, and Lhasa blockprint recensions of the Kangyur, and also in a recension with annotations by Bu ston. This Shong revision was then further revised by the two Jonang translators Blo gros rgyal mtshan and Blo gros dpal bzang po. The Jonang revision is found in the Yunglo and Peking blockprint recensions of the Kangyur, and also in a recension with annotations by Phyogs las rnam rgyal.