More than a year ago André Binggeli, Marie Cronier & Didier Lafleur have published an article in Scriptorium. In it they provide a detailed analysis of a 11th c. Greek lectionary that had been put on sale in 2011 in Paris. This analysis is a model of clarity and an exciting read at the same time. 

Now, we know for sure that this manuscript which eventually ended up in the Thomas Fisher Rare Book Library (Toronto University) indeed is GA lect 793.