ORIGINAL: mgk3961
Just watched the video. Doesn't look that violent, comparatively speaking. My question, has the arrow already left the string by the time the string strikes the STS? It appears to me that the STS is altering the natural flex of the string. If the arrow is already on its way by that point, it's a moot point. If not, I can see how this would change the flight of the arrow.
The arrow is still attached to the string at the point when the string hits the sts. This is why you gain some FPS from an STS, it forces the arrow to leave the string earlier, rather than holding on and being slowed. You may have to do some minor tuning adjustments.
I didnt have to retune at all, but some have had minor tuning problems, that can be easily fixed.