David's point of using aluminum rivets to avoid corrosion with the
aluminum extrusion is certainly sensible.
Another factor arguing for aluminum is that Amel may well have
engineered the assembly so that the rivets will shear before something
else breaks. (When, for example, one forgets to remove the ballooner
halyard before furling, as I've done a couple of times. The anti-roll
bars bent right over allowing the furler to rotate and come up tight on
the halyard and then the rivets sheared - much like a shear pin on an
If that was part of the design, then SS set screws may be too strong.
Craig - Santorin #68 on the hard in Siracusa