We know ! We've been a little slow in making a 150mm Half Ball Adapter available. The wait is over ! We are putting the final touches on the drawings and we should be ready to enter production within a couple of weeks. We hope to offer this product by end of May. Very light, made from one block of aluminum, incredibly strong, the MYT 150mm Half Ball Adapter will be machined in the same fashion as the 100 and 150mm Bowls, on our 4-axis CNC machine. It will also be compatible with the MYT Glide Medium and Large. Stills will be on the site very soon. We hope to have the adapters available by early June.