Thanks for the advise. It's hit and miss but when it hits it's rattles way too loud. Definitely going to call bds and see if they can help me out. I've heard good things about there customer service.
JKS makes good ones. They run around $150 for a set I think. You can make your own though if you choose. Here's a good write-up: http://www.4x4xplor.com/homediscos.html