It's a straight swap (the CPU is on it's own board). I didn't get the original 601, it came with the G3. I just swapped it out for a 604 to play about with Copland and old BeOS stuff. I want to use it for my occasional printing needs (I've only got a CSW1500) as the 5400 is a bit tight with 32MB RAM, especially when I need to use 8.6 for Acrobat Reader 5.

I thought the battery was OK because the clock was keeping time, but perhaps it was a bit weak. Enough to keep the clock but not enough to keep the G3 happy. So now I have no battery in it. I'm using Network Time to fix the time on boot and PRAM Auto-Restore to set stuff like Appletalk on ethernet rather than printer port. Seems to work fine.