...I have $170 worth of parts coming from China and thought about canceling. ...
A couple of lessons learned. How to distinguish between internal and external noises and don't order parts on assumptions. It's always better to find out what you are dealing with before deciding the best option. Another Tip is always check the simple and cheap things first before delving into the more complicated causes. I've seen people change good gearboxes and differentials trying to fix noises coming from worn wheel bearings and another guy who bought a new alternator only to find that the $12 regulator was faulty.