Well, I got the new saddles and installed them this evening. Those height screws definitely aren't going to move! I also put the .010-.052 set that I had the original plastic nut slotted for. I've got the intonation more or less set. Now with the new strings and new saddles, I'm going to have to let the neck set, adjust the truss rod, and then do the final height settings. After that I can finalize the intonation. It's weird acoustically not hearing hearing the bridge rattle all over the place. I'll be able to listen to it plugged in tomorrow--kids are asleep now.