Hi Rob,
Wooden "seluts" are not that rare, but i don't think this one belongs with this hilt. When i have seen them they usually allow for a jewelled ring to fit between it and the rest of the hilt. I have one like this, i'll see if i can get a photo up soon.
As for the mendak (uwer), i also think a keris like this looks better with. It seems a lot of Balis show up without them, but i don't believe this is by design. A mendak completes the ensemble.
