A bit of info about this subject …
While the PM66 table saw is a fabulous machine, it pre-dates the time that manufacturers built saws that have a riving knife. It does accommodate a “splitter”. The difference is that a riving knife moves up and down with the blade … which you can observe on the SawStop. A splitter is a constant height device.
The splitter currently in use on the PM66 is very tall … significantly taller than the blade at maximum height. It would make more sense to have a splitter that is even or a bit shorter than the max blade height. That would permit a sled to work without having to add bulk to the sled and otherwise modify it to create a large rear kerf. Such are available toward the bottom of this web page: http://thesharkguard.com/orderpm66.html
In addition, the handle for the bolt on the existing splitter can interfere (lift) the blade insert when the blade is tilted to 45 degrees. If a replacement splitter has the same problem, then need a volunteer to craft a better solution for the bolt.
Would also be worthwhile to post a picture of how it attaches … not complicated, but maybe not quite intuitive either.