As Phase5 tools use their own tricks and differ from HDToolbox, it's best to at least not to mix them. I had no bigger problems with Blizzard 2060 and HDToolbox 3.1, neither with CSPPC and HDToolbox 3.5/3.9. The problem with 4 GB and 3.1 doesn't depend on the controller, the first contender is the filesystem used.
