I say get the supposed faulty units back and check them, or have them checked under warranty. If they have burn marks all over them, then the customer obviously has installed them incorrectly. I always rely on the manufacturer, or his agent to bring some factual reality to the problem. The manufacturer or his agent are experts and well versed with all these products. They will tell u in 5 seconds if its a faulty one, or a damaged one, thus probably saving you the $200 etc. Expert advice from these people is usually always free.

You would be amazed at just how much people will help you and give you great advice once u ask for their professional opinion. Get the products back before sending out anything else. Thats the only way to determine who or what is at fault, thus saving you $$$. Going it alone on a specialised product is only good after u exhaust all other options.