Naturally, I don't look at each and every mask that is being shipped, but yes, that's the rare 1.0µm thing. And yes, masks E72N, G54B and J82M will have a higher success rate when overclocking.
Yes, stronger PSU would also be something I would have considered.
"strong" is not what you're looking for - it must be "better regulated". The whole trick is to regulate what actually arrives in the computer, rather than regulating what's at the output of the PSU. Those Elektroware/A-Power/Centurion/Keelog things all use some PSU chassis, even add a display of sorts in some models, only to fail on voltage drop on the cable. This is just *so* wrong, and people don't get why their computers are unstable.
Those "aftermarket" or "modern" PSUs are failing to meet all three of the three key specifications that Commodore has put out.
I have been tempted to start lawsuits against those companies a number of times, but held back in order not to stir up the mood too much. It's enough for me that customers of the CA-PSU are reporting success on all fronts. Our PSU FAQ has all the technical details.
Jens