Hi all, please forgive me as I am total newb when it comes to mtn biking, I recently purchased a Giant XTC2 that came equipped with the Rockshox Dart3 fork, I want to make sure I understand how to adjust it, I understand what the lockout does, but I don't understand what external rebound and preload are and how to adjust them properly (if there is such a thing)and where these are located, I have searched SRAM website for a user manual but only seem to find technical info on the item. If anyone can help a total newb out and explain what these adjustments do it would be greatly appreciated.