Ok, I've searched, I really have, but I'm trying to find concise info on the differences and similarities between the original metal grilled MB210 and the cloth grilled MB210-MkII. I've found a good deal on a new MB210, but want to make sure I wouldn't be missing out on something that only comes in the MkII. So far I've found that the original MB210 may be made in China or the US (how can you tell? I want a US made one) and I can see a small fan on the MkII. Any other changes I should know about? Same 10" drivers? Same cabinet bracing & damping issues? It's not as affordable for me, but I'd kind of prefer some of the features of the MB500 and a separate head/cabinet over a combo. Does the MB210 MkII use the same power amp section MB500? With the MB500, can you feed an external signal into the effects return without cutting out the bass signal? It's not a deal breaker, but it'd be convenient if I could do that.