Well so I buy a Tweaker 40 c from GC used section. Have it for about 2 weeks and the thing shut's down. I take it to my usual Amp guy and he traces it down to a bad Transformer. So I bought GC extended warranty so figured it would cover it. Have it in the shop for a month and today they tell me the fix's cost more than they will spend on it!! They want to replace it with another used Tweaker. Which will probably end up with the same issue! I re-tubed and biased the Amp complete a few day's after I bought it so I'll be out that money. And have to do it again on the new one. Man I like what the Amp sounds like when it's working but may just take a refund and buy something else!!! GC no more for me!!!