i'm actually annoyed by the shape.
It seems to be two patterns spining in opposite direction. The thing is that with the FPS i have, it looks like there are only two positions the target marker may be in ;P It hurts an eye if you start caring about it^^
I gues the effect would be better if it was one pattern spinning in only one direction.
There was some mods once, to bad they are probably lost forever, because they looked really good. Some people just don't have strenghts to get stuff in game, because it isn't that simple.