I'm running a 13 tooth CB and a 52 tooth spear gear and I want to go LOWER for my Savage Puller, does any one make a "say 12 tooth CB and say a 56 tooth spear gear"? I want to go as LOW as possible for wheel speed all I'm doing now is slipping the clutch at 3/4 track with 50 lbs on the sled. Any...