Nicolas and BHK9,
I had a chance to attend their Master Class last October in Mexico City.
In that ocassion we partly dismantled the 875 caliber, from the Reverso Grande Date, and naturally put it all back together. Quite astonishing to see all the detail JLC puts into parts of the movement even though they may not ever be seen by its owner.
Overall a great 3 hour experience in which I got to play with a great machine and put my hand-eye coordination to the test.
I already told my girlfriend that a JLC is in my near future, as a ¨thank you¨ gesture for having invited me to the class. LOL. Of course she then gives me a your crazy - go buy me an engagement ring instead look!!! LOL!
Best regards,
Alex

The instructor showing us what we where going to do next.