Looking at the Accessories page of their website, you can buy different ROH spinners for $50 each (3/8", 1/2", 5/8", 3/4", 1"). It doesn't appear that you can set an custom ROH between those presets. Also, it sounds like you can't pick the spinner of your choice when you buy it. You have to get the 1/2" and then pay another $50 to get what you really want. Other than that, it looks promising and I'm looking forward to seeing more details and information put up on their website. Also looking forward to real world reviews.