HAVE ANOTHER QUESTION FOR YOU GUYS. i HAVE BEEN READING ADS FOR SOME HELICOPTERS AND THEY HAVE BEEN GIVING DESCRIPTIONS OF THE LATEST AND GREATEST PARTS FOR THE HELIS. I READ A COUPLE PARTS AND HAVE NO CLUE WHAT THEY ARE OR DO. ONE WAS A GRAPHITE BASE PLATE AND THE OTHER WAS A SWASH PLATE. WHAT ARE THESE PARTS FOR AND WHAT DO THEY DO.