As wonderful and amazing as modern technology has become, you still can't get a proper needle setting for your engine on the internet, because online the weather and water conditions are always perfect, and all the 20 hydros will heat race at 80mph. In the real world this is seldom if ever the case. You run your model boats in an area that has several highly experienced and knowlegable boaters that would be more than happy to share their wealth of information with anyone that will heed their warnings, listen to and follow their directions and suggestions, and ask for assistance.