RCTgo

http://www.nolimitscoaster.com/community_support.php
German and english tutorials/demos, etc.
What is great about these, they have for all different levels.
And a section which has a more detailed tutorial with more options etc.
I hope you will enjoy


NoLimits 2 Videos:
Flying Hunt - Concurso Nolimits Rollercoaster 2
https://youtu.be/lJV2kskyD2E