Opinions will vary.....

I don't feel the 368 is the best choice in this application. Not coreless, small footprint, smaller gears.

I have used the 368's with great success in other applications but I feel that dual elevators on a pattern model is not that best application.

I'm not a fan of dual servos back there...but the 3421SA or the 9411SA are the best choices for this application in my opinion. I would stay with the 9411SA if I could the difference in weight is only 0.25oz per servo for the 9411SA to the 3421SA. The larger footprint of the 9411SA and the larger gear train in my opinion are going to have benefits in the wear and tear category.

I also can say that the 9411SA is the absolute best pattern servo I have ever run in terms of wear, performance, precision, and speed. I would think these features would make good elevator servos as well.

I just don't like having dual servos....I guess I'm just to critical of my equipment these days. I find it tougher to maintain the dual servos in a matched environment. I can do it....and have done it. I just feel airplane maintenance goes up, and the plane doesn't stay as dialed in as long...Pot wear causes changes in the end points of all servos...We always associate centering issues with pot life. But the end points will float too. This is not a good thing when your are trying to pull or push straight corners. A single servo while its pot can wear too will not give differential throws to the elevators...So the centering is really the main issue with pot wear and not the other things induced.

On Ailerons when you have dual servo issues on the end points changing the result is not as critical as the resulting in a change is the aileron differential settings....So the rolls are not going to be as Axial....but our planes today are very forgiving in this area.....And since the changes are small you rarely see them. Centering of the aileron servos is much more critical and this is where pots show their wear.

On elevators the changes are more pronounced as both surfaces are trying to move in sync and same direction....

In the last year or so I have become much more critical of loop tracking. I feel in my flying this is one of the most critical things to helping me fly better. Worn pots on aileron servos is bad enough on the loop tracking but now inducing another variant.....Not the best solution for me.

Again my opinion and others may vary.

Troy Newman