If you are unsure of which model you have; do not worry, it is pretty easy to tell which one you got. The basic difference is the roller arm assembly. The Plus/New Style models use the Quick Click type snap on roller arm assembly. The original uses a screw on type arm assembly. So simply compare how your existing arm attaches to the unit.
If you are unsure of which model you have; do not worry, it is pretty easy to tell which one you got. The basic difference is the roller arm assembly. The Plus/New Style models use the Quick Click type snap on roller arm assembly. The original uses a screw on type arm assembly. So simply compare how your existing arm attaches to the unit.