Don ... I must respectfully disagree with your comment that ARC has poor customer service. It's difficult to judge the situation described by the OP just comfortably sitting in my music chair ... so I won't.
But based on my personal experiences dealing with Kalvin Dahl and Chris Osanna, IMO, ARC provides top drawer customer technical support and product advice. Heck, when a pesky bias resister blows, a local ARC authorized service tech makes house calls. Saves me schlepping a bulky 75 pound amp around. Further, if you search the Forum archives, you will see that many others share my opinion.