The discussion of flutter ought to include a lesson or two for beginners....................

Slop in connections is bad. OK...... Obvious lesson.

What hasn't been mentioned is the slightly bad advice a bunch of beginners get from some of their more experienced flying buddies. Quite often, you're told that "it's easier to adjust the servos with that radio, you paid for an expensive computer radio, after all." You had no idea what holes to snap the connectors into and you've wound up with an elevator that works like a barn door and ailerons that go straight up and straight down. And it's not on a 3D, but on your trainer. You're actually in a world of hurt and don't know why. And the field expert has just shoveled some dirt out of a grave he's digging for your airplane.

If the ARF instructions don't tell you what holes in the servo arm or aileron/elevator/rudder horns, then do this:

Use the hole in the servo arm that's closest to the servo and the hole in the horn that's the farthest from the surface. And if that doesn't give you the amount of surface deflection the ARF instructions have suggested, then move the servo connection out one hole and try again. Still not enough? Move the connection on the horn IN one hole. Still not enough? Move the servo connection out one, etc etc Or you can simply try each hole in the servo from inside out. Both plans work.

The idea is to give the servo help with leverage. Or at least to not hurt it. And once you've got the mechanics worked out to the advantage of the servo's and the model, THEN you can fine tune it with your expensive computer radio. But don't screw things up with the radio until you've gotten the physical connections in the ballpark. If you've got bad leverages to begin with, "correcting" the surface deflection with the radio winds up making the servo's work even harder. You'll actually get less force out of the servo and probably get less accuracy as well. And to defeat flutter before it begins, you need to insure that the connector rigging is helping, not hurting the servo's leverage.

And learn yet another even more subtle lesson.......... Next time you find an expert with that advice about using the radio first, put him at the bottom of your list of people to ask for advice.