OFWW wrote in
:

I've been thinking about making a splitter to mount on the insert
itself. Guess I'll be looking hard for one know.

I have seen, altho not made one myself, splitters that are
just a thin piece of wood sticking out of a zero-clearance
insert. The key points are the splitter should be just a
tad thinner than the blade, and aligned perfectly behind
the blade.

Of course, you also want it strong enough that, if the kerf
closes on it, it doesn't just snap off.

John