I did my first flight with a kingtech 140F in my old rookie. I got it to run on diesel and no flames at all on start up. The throttle response is scary from 3 clicks to full power in less than 2 seconds, maybe one second, it is the fastest I have ever seen. The power is amazing; I fly around at about 1/3 throttle used to fly at 1/2 to 2/3 with my 120. I am very pleased with the Kingtech. Thanks Berry