Im using the NMP header w/brace, a CF pipe from Central Hobbies and a 15x11 4B prop. This is a really impressive setup. Really really powerful, quiet and has held up exceptionally well so far. I would guess I have about 50-60 flights on the plane thus far. I took Troy Neumanns advice and used the NMP header washers and tightened up everything with the engine hot. This made all of the difference in the world. Before I did this the vibration from the 1.60DZ would knock the header loose from the engine every 2-3 flights. After I got the washers and did the hot trick, that was it.. I still check it for tightness every few flights and I have had to snug it up a couple of times but not but about every 10-15 flights or so. A really low idle on the ground produces a HARD lope, I think that is what loosens the header. I have learned to keep the idle up just enough to smooth it out on the ground then ease my idle slider down once Im in the air.