Glad you worked it out. The one area I had not been able to tackle fully was the passing of grades between sites. I am not sure if that fully works or not. I assume it does.
We mainly use LTI just for SSO to other activities such as Wordpress or Chemvantage.
As described in the posts above, the application of LTI specification provides course sharing as an activity within another course. I think it is useful to use this specification to create a system that allows you to share courses of a Moodle platform A to appear in the Moodle platform B, probably within a category "Remote Courses". You also want to support the display and storage of course data in a transparent manner between this two Moodles, as if the course is really provided by Moodle platform B.
I would like to ask if someone is already working in this direction or if you have any idea on how to proceed.
