Ya, Feel free to contact them, but don't expect an answer. They only answer every third email, unless your buying a new rig. But if you need to order parts because the controller got hot, or some other reason, they're busy now making big money selling rigs, they can't be bothered with little things, like keeping your rig running after you buy it.
Hm. Let them know I'd be happy to help, I'm not free (well, information is free, service is money) but fair.
As the first mention already said, they only reply to every 3rd email. Give us the info so we can buy new controllers, even though the rig is still under warranty. Just reply in a very timely manner, like the rest of the world that knows what customer service is. Miners make the most money when you first buy them, so not letting us fix our own rigs, is seriously costly. Even when we are happy to pay, even thought he rig is under warranty, still no reply.