Hi everyone. I'm a newbie in the sport of rc flying so please bare with me if my terminology is off in explaining myself. I just bought a P-51 PTS and have had all sorts of issues, engine wise, since I started her up. First she was set at half throttle and wouldn't come down to idle. So, I reset the linkage to correct that. Now that I got it to idle, It wouldn't run past half throttle, so I messed with the 2 settings as described in the owners manual for the engine. I got that working. The radio was set at -40% for throttle trim and the idle was now too high still. I hit the throttle cut off button on my radio and the plane still runs and the throttle barrel is closed. As I was messing with the low speed screw and blipping the throttle, I noticed the barrel wasn't moving as it should with my radio controls. It wouldn't return to it's original position evry time I moved the throttle. I was at wits end at this point, because I didn't realize the throttle stop screw was loose from the factory and hence didn't notice that because there is no mention in the owners manual about that screw, so I didn't even check it. Now I'm at a loss of how to set the carb up with this screw. I notice that the barrel will come out further as I loosen this screw more. Can someone tell me how to set up this screw and how to set my throttle up to work correctly from the beginning? I am a gearhead by nature, so I should be able to figure it out on my own, but would rather leave that to someone knowledgable in that area. I don't want to send this plane up for the first time and bring it home in pieces because of not knowing what I'm doing. Oh yeah, so much for READY TO FLY out of the box! This must've been a Friday end of the shift slap together job! LOL My aileron setting wasn't set up properly from the factory either, they were operating backwards but a call to tech support got that straightened out. They went through all the settings with me on the radio and others were not set properly either. Hope this isn't a sign of what's to come when I get this plane in the air!! LOL