The manufacturer of the device had encountered some opposition from various saw makers in the adoption of his device. According to him the saw makers feared that any actions taken to adopt the device, or even acknowledge its' existence, would become fodder for lawsuits.
That has changed in the past few months, and several saw makers are looking to incorporate the device in at least some of their models. These other models are not yet available (AFAIK), so you are still limited to buying the model produced by the device maker.
