I heard that they might be recording some of the hands-on Xtraction at Interchange next week and uploading them to the Momentum site.
That'd be awesome!
There is also this E-Learning for Xtraction: Feature - Data Model Editor Schema View
here is the full link: E-Learning Xtraction
Here is a link to some modeling as well How To: Import a Data Source / Views / Tables / Fields from another Data Model files into another one like datamodel.dat?
At the link to Momentum that has upcoming and on demand if you missed it: Momentum