I am getting a lot of slop where the Akas attach to the Adventure brackets. It seems to be wearing pretty significantly.
Been there, done that
Try getting some 3/4" - 1" round self-adhesive felt pads, the kind you put on the bottom of furniture (chair legs ect.).
Place 2 pads on the flat end of the ama arm opposite to where it will contact the Adventure x-braces. What you are doing is letting the felt pad become a shim in the hinge point. That will minimize the up and down play of the aka. The holes will still be worn but at least it won't rattle and, if done right, will remove all up/down play. You might have to crush the felt pad a bit to get it to fit.
One of the consequences of worn aka hinge is not only will it rattle but the boat may heel just a bit more because of the play. Also, once worn the excess play will accelerate further wear.
Have 2 Islands purchased in Oct. '06.
There may be some variances in the hardness (tempering) of the aluminum. I sent some parts in to Matt for his engineers to look at - he will be getting back to me about it soon. I have had much less wear on a different set of arms and X-braces. So there may be only a few isolated cases of "soft" metal out there.
ps I originally used outdoor carpet but found the felt pad to work better.