You're most welcome.
Let me then refer you also to important comments by the author of Apprentices. Especially
Matt Ryan:
The real measure of the teaching Hermetic Virtue rule is if it doesn’t work for other magi. I wanted a rule that lets magi teach apprentices, but wouldn’t let magi teach magi. There are other ways for magi to gain new Virtues. In my mind, Virtues should be taught during apprenticeship only. Did I design a rule that allows a magus to teach his apprentice but not his sodales? You tell me.
Cheers