OK, I couldn't wait and went ahead and installed it. It did require a re-calibration from what my Katzeye had, which surprised me a bit since I thought I'd read that shouldn't be the case. Of course, my Katzeye could have been mis-calibrated. I had some genuine Pentax shims so I used one of those instead of the plastic ones supplied with the new screen. I got lucky and my first guess for the shim-size was correct so that went quickly.
Guys, this thing is all they say it is. Night and day difference from the Katzeye, which means it's that much better than the stocker. One thing I noticed right off was that the +1 EV Comp I had dialed in needed to go bye-bye. This screen allows much more accurate metering. I tried the DA*55 first at 1.7. The hair-thin DoF can easily be seen now. Man, this thing is awesome! I went through all the FA Ltds just to play with 'em. Even with their relatively short focus throws, MF is
much, much easier now. Tomorrow, I'll get out the Zeiss' and really let this thing shine.
dlacouture deserves all the credit for singing the praises of this screen. I'm SO glad he started this thread!
Edit: I forgot to mention, don't let the AF area markings that focusingscreens.com puts on bother you. They are
barely even visible. In fact, sometimes they aren't visible. I'm actually kinda glad they're there because they serve as unobtrusive compositional aids.