I totally Agree that's what i did. i had an early model MB2-500 that i didn't have problems with my amp. One day my red light just started flashing repeatedly during normal play, so just to be on the safe side i went ahead and sent mine back to the factory. I got an 07 version and its been flawless ever since and i've had mine revised amp for over 3 years. I had read on Talkbass about all the problems people were having with the early models and the GK was switching any flaw models so i took full advantage!!!!
Roughfully a year ago I contacted RAG when the MB2-500 failure discussions we're just starting here at Talkbass and asked if my nearly new MB2-500 could be up-graded to a unit "known" to be fault free.
I was told, "If there's not a problem", no.
Honestly, that's the response I expected at that time.
Well, now there's a problem with it!
We'll see how it's handled.
Haven't had a response to my e-mail yet, but I just sent it this morning.