Your about right where I am on the lsn. Just thought I would throw a few things out here. The stumple that people are feeling in the mid range can be normal at some point even running the grp pipe. I know that when alan burton helped me with mine to make sure it was right after I broke it in. He kept saying listen for the little hesitation in the middle of a smooth trigger pull. By smooth I mean pulling lightly all they way through not just jerking full trigger. He said it was about normal for these motors to have that stumble in the mid range. It also probably been said but the motor shouldn't feel like its winding out on the straights. It should feel and sound like its lugging the whole way. While generating smooth consistent power from bottom to top. Besides the stumble he mentioned. Was also gonna throw out yall may wanna check your bearings at the gallon break in mark. I had bought tko's and was gonna put em in about 2 gallons mark. Took my tuned apart to check it out at a gallon. And the front bearing was tanks away from going south. Real rough and gritty. Tko's solved that.
I've gotta think that burton driving for team losi and grp and horizon. Knows the grp inside and out. I just watched how he tuned his asked questions and listened to what he had to say. And it help me out a bunch.