I had a new nut cut for my lefty 656ce and installed the Taylor Acoustic Wave Lefty 12 string saddle. The factory nut had the 'A' course too close together.
I had played an Acoustic Wave saddle on a T5-12 and liked it so I had my local guitar tech in Sacramento (Arnie Gamble) install it.
Very nice. Great intonation. Not the greatest picture!
Eric