Mtwoodson:
I do not know if the SST of your AyA is the type with the selector in the trigger itself. If that is the case, the mechanism is really simple (ugly, but very ingenious) and normally the problem with them is that the adjusting screws loosens and/or catch dirty in the moving parts.
If you have some basic gunsmith skills, I think you can adjust and clean your trigger by yourself. You only need a good set of screwdrivers to unassemble the shotgun and take out the trigger assembly. Some small parts inside, like a spring (not a coil spring, but a "right" one that is the "soul" of the system.
I adjusted one of this 2 years ago in an AyA 37 super and it is performing fine without a single malfunction since then.
Good luck,