I am looking for a answer to a reoccuring problem. I used a SST mechanical last year and had many ploblems with their flight characteristics and noise. I tried to move the band forward with not much success. I have since tried to re-fletch using a 4 vane 3" and 4" right helical to offset the broadhead. Is this just a problem with the faster bow speeds on the newer model bows. I'm shooting a Drenalin at 68Lbs and Vapor Trail strings.