What seperates a good arrow from a so so arrow is its ability to deliver on shot placement first and thn repeatability arrow to arrow after that. I have had complete penetraion through several hogs with a two blade Rage and i wasn't using any Ultrathin shaft. There are happy mediums in everything. The smaller the shaft the smaller the target for the string which makes tuning and forgiveness that much more critical. You are basically creating a very small target for the string to hit
If anyone has had any problems with the Kinetic nocks and inserts please contact us at Gold Tip at 800-551-0541. The first two generations of inserts for this arrow did have some bending issues but the third generation that we have now are doing phenominally well. As far as the nocks go there were some issues last year that are resolved and if you have experienced this please contact us and we will take care of you right away.