Thanks, and I didn't know all that, just that it was not as well documented. A guy gave it to me, said it was "blowed up". Found a faulty cap, decided to replace all of them. Works great now. I might give it back to the guy as he seems to have some sentimental attachment to it but gave it up when another tech told him to cut the cord. Still, Colt black shadow is a pretty cool name. Do you have any idea When these were made? No date print on the plate. Pretty low serial number too, judging by all the leading zeros.