If telemaster wants to think his engine has never been over 10,000 so be it. I have run many of my saito engines over 11,000 on the ground with no issues in the air and I have run them on 55% nitro too. I think I know their limits lol Some manuals are written to keep engines in a low power safe set up so their isnt any warranty issues. These are bad when a new guy asks a question and gets a million answers and he never asks a question again.