Module srews are tight, it did appear that the string may have stretched, so I will check rotation,I actually have thetech book with these measurements listed in,the silencers are tight, will check the speed nocks.The Bow tech at there customer service center was stumped, as this bow has been performing very good for them.They did giveme a return number to take the bow back and service it, or to replace the bow. I will run through it one more time to check the items you have listed, before it gets shipped back. thanks for the tips. Will let you know the out come. Besides the buzz, I love the the Bow, and look forward to hunting with it for years to come.