good core shape nighthawk/evolution series are some the best made, the balls i mentioned are not this core but also old rehashed core shapes. Why not keep updating with new covers and diffs for complete series of bowling balls.

After owning 2k plus balls in 10 years i can tell you certain cores are just better than other designs, the El Nino series comes to mind. Storm is being tricky and still making these for oversea's but screwing over us here with no retro product line.