Welcome to the forum! I have a 2010 Bengal and making it quiet is not an issue. The cam is the first thing to check to see if it is over or under clocked. Once the cam and all the specs are right on the bow, it will shoot as it is suppose to. Then adjust the STS a 1/16 of an inch from the string. Then experiment, mine is the most quiet when touching. After that make sure you have a heavy enough arrow. Also put limb savers on the limbs. And last cat whiskers on the string. And as far as a crack in the riser take it back to the shop and Martin Cs will take care of it.