Mother of god, I am reading what you guys are saying 10 times, I kinda got it a little (well definitely more now than before) but still not ticking in for heavens sake.. jesus........ is there something wrong with me?? lol Whenever I understand a little what you guys are saying, I go do another example and I struggle again .. it's like a cycle .. but thanks for your efforts, really appreciate it a lot. I'm new to the whole aviation world, I don't even know what an RBI is!