That sucks if it's true.

I just looked on FastServe and they didn't have the 3421SA but they did still have 3421's and they still have the SA gear sets for that servo. I'll send an e-mail today and ask what's going on.

However, from where I sit, you have two options. You can:

A. Use regular 3421's. My current airframes are a pair of PL Partners that I bought from Quique. These airplanes were last flown in 2003 at the Worlds, and at the time the SA servos were just being offered, IIRC. Consequently, these airplanes had regular, metal geared servos in them (9411's and 8411's). I have not had any trouble with the servos in their metal geared form, however one could argue that the repeated beating from a four-stroke could cause them to go. I just replaced my servos in one airplane just to replace them, and while the new servos, which are the SA variants, feel tighter, I didn't notice any appreciable slop in the gear train on the old servos.

B. If you can afford the weight, 9411's. These, according to FastServe, are still available in the SA version, so if you desire nylon gears, this would be the way to go. They are roughly 3/4 oz heavier per servo over the 3421 if you're not familiar with them. I actually am running 9411's on my elevators and ailerons, on the Partner that I'm currently flying.

I hope this helps you some, and I'll get an answer back from Horizon- they're an hour behind me, so they're not open yet.