Shaggy,
All I've heard about is the urethane that is being tested. They were looking at the super bomb core and a solid diamond, such as the XL. I think they are leaning towards the single diamond core as that would be more controllable where the super bomb core might be too strong for the coverstock, IMO. I'm hoping we start hearing about these new balls around mid-July and can start ordering by early August! Take care....JS