Here is my two cents worth of information. I have five TT46's on five different aircraft. Great motors. I DO NOT break them in. I set the idle and max RPM and then go just a little rich and fly, fly,fly. I use 10 percent fuel and usually a 10/6 prop and an OS plug. I have an UPROAR that I use a 9/7 prop. It just screams and loves it. It has had many gallons of fuel run thru it. I know this doesn't go buy the book, but it works.