I'm using the rear flange neos. Trimming the flange bumps the theoretical combing problem to around 9500, IIRC. In practice, though, I've never heard it when not doing freq sweeps. This could be due to several factors: the steep roll-off in my hearing above 10k due to a lifetime of exposure to rock concerts and unmuffled race cars (I think a three-rotor Mazda GTP car was the tipping point); the relatively low frequencies in the music I usually listen to (rock/blues); and because I am almost always doing something and moving around when listening to the arrays, which are in the heated portion of my shop.