I'm trying to see if I have a hole in my arsenal, but if all I ever bowl on are medium to crispy conditions, how do I know? Where are these heavily oiled lanes so many of you find? Do you have to bowl in tournaments to really see this? I'd like to get to that level, but I'm definitely not ready for that yet......Another question, is there any benefit to a skid/flip-type ball compared to one that nicely arcs into the pocket when dealing with mainly medium conditions?