yup, everything is isolated. The no load test went fine. I had no idea how long the delay would be, so that added a bit of anticipation, but other than that the rails came up to 252V and 498V. I had +12V and -15V, but I'm assuming that's because there is no load on that -15V at all... before you ask, yeah at first glance, the part number was correct.. heh. tomorrow I'll see about mounting the heat sinks and getting the loads ready.