Rawlings Pro Line Owner's Manual page 3

Figures 1 & 2: Baseball and softball leg installation
to clear the wheels by 1/4 - 1/2". Placing the tube in contact with the
wheels will damage the tube and wheels, and may cause the tube to be
grabbed and thrown. Placing the tube too far away from the wheels will
diminish the machine's accuracy. See Figures 3 & 4.
Figures 3 & 4: Baseball and softball ball feed tube installation