Well, I had 2 4D pstwos go down on me without the fix. They were both running Crystal-Chips
That bit of info on the foundmy website is talking about the fact that some of the newest PStwos, as in the ones that started shipping a few days ago, have 68k resistors in place of the 30k ones. this is half of the foundmy fix, so you wouldnt need to install that part. If you have any questions about it, email him.