Sorry these are still a little blurry, my cheapie camera doesn't like to focus up close... this shows the 2mm bolt and flat washer that keep the servo horn trapped in the lift arm the bolt goes down along side it so the horn can slide a little to account for the offset in the mount location
This one shows the bolt head on top of the arm....not to obtrusive
And this one just shows the servo horns laying inside the lift arms, you have to cut away the plastic from the inside of the arms almost all the way up to the first cross bar... once done you can't see it and the servo horn and bucket help strengthen it a little
It's coming along pretty well so far but again it's a pretty well documented build....