I am using a set now on my JS-II. They add a smidge of brightness. But hopefully the Monkey God will chime in.
I'm partial to the original wood saddles on Starfire's and M-85's but also really like the stock dense plastic saddles that came on Coronado IV's...same bridge...same shape saddles...just made from a different material. Just a different take way back then on the saddle idea from Hagstrom. They sound excellent on Coronado IV's.
Its got all wood now.And my now-gone Alembicized Starfire sounded mighty fine with a mix (yes, a mix) of brass & wood. It's all good.
Its got all wood now.
I like the idea of ebony saddles!