Mines cut back to leave about the same. You've got to remove the screens as they are by far the most restrictive part. The surface area of the screen must be in order of +40%. If you remove one and try blowing through it you'll see just how restrictive it is. Add a few bugs and the flow is even worse.With an undertank filter the bugs are not a worry. Mine really flys like this. With the Casoli filter it also sounds way better and looks cool..
