psh how am i supposed to know thats your name?!
i seriously dont see why zframes and flat lines shouldn't be included. or if you want to play that way, ill mention the flatline autococker that COMES with a flatline.
now for the crownpoint/whisper
the way these barrels work is that the weird porting gradually 'introduces' the paintball to outside air pressure eventually, making for less air turbulance behind the ball.