Except that the Hebrew equivalent of Logos might not be Davar. It might be Omer (aacented on the first syllable) from the root alef-mem-resh and spelt alef-mem resh in older spelling and alef-vav-mem-resh in the Qumran texts and Rabbinic texts. Have a look at what Jastrow lists.
Alternatively you could print h with a dot under it, instead of of both instances of ch, which represents h.et (ח). This would clearly distinguish it from the fricative or soft k(כך) , which can be transcribed ch or kh. I suggest you make a decision on transcription and try to be consistent throughout the book.
Do you know how to set up your computer to type dots under letters without the letter getting separated from the rest of the word? That is, without using the omega symbol on the toolbar each time? If you intend to use the symbol of h with a dot underneath (ḥ) I can write the instructions for entering it into the keyboard.
A sample of what appears in the Real Messiah order it here
