Hi bdphil,
What Extra is that? I fly a RadioCraft 35%
Do yourself a favor and add a 4-40 jamb nut to the titanium link and jamb against the standard thread clevis to keep the link from rotating (I know, they feel nice and tight...). Also call Nelson Hobbies and have him send you some more of those 4-40 lock-nuts and add them to the "Rocket City" side of your linkage. Use a longer bolt, through the square nut and then the lock-nut.
I know, I'm paranoid, but it doesn't hurt a thing
Later,
Willem