[iTween] Shake Position Alternative

I've been playing around with iTween's Shake Position command and I find that it really doesn't fit well with what I'm trying to do. iTween.ShakePosition (gameObject, new Vector3 (0.75f, 0.75f, 0.75f), 5); For example I want a camera shake that lasts 5 seconds, and stutters consistently all throughout. Instead, iTween uses large periodic jitters over the first 3 seconds and in the last 2 seconds generates transform values so minuscule that they barely register as shaking. Stretching the time to 10 seconds means that the first 5 seconds consists of irregular position lunges.

Is there an existing method of creating a shake effect similar to what I described that's used with iTween that consists of iTween.moveAdd code? Preferably moveAdd so that it doesn't conflict with other iTween animations on the gameobject that may be running. From my preliminary searches, I don't think code like that has been uploaded yet.