Alex, If I read your post correctly it seems you prefer the used PM 66 over a new PM 2000 and your only concern is with the riving knife. It is not difficult to make a bunch of ZCI's and glue in a 1/8" piece of plywood as replacement for the factory splitter, then install the new insert and raise the blade to the desired height cutting into the newly glued in plywood splitter, when you make 2 or 3 of them for different blade heights you'll be covered. Swapping inserts is a matter of seconds, you could even make one that allows for non through cuts. It would be somewhat trickier to make inserts for beveled cuts but not impossible. Other than that get or build a blade guard with dust collection hookup.