Our team had this problem. We found that the wall between the wheels acted as a break slowing the frisbee down and it went through the shooter. We fixed it by moving the wheels as close together as possible and removing the wall.
We are running a cim 1:1 first wheel 550 3:1 second wheel and 550 1:1 80% third wheel
https://www.youtube.com/watch?v=qgMb...e_gdata_player