I've never worked on another 924, so I don't know if mine's fighting more than they usually do. There are still some, er, legacy electrical issues, though. I'm buggered if I can get the NS headlight to work consistently at the moment and the pop up lights don't go up or down. I suspect that may just need a new relay, but I've been so busy with other stuff I haven't had time to look into it. In fact that's the main problem with this car, it's just been neglected for the last few years because I've got too much other stuff on, fixing (trying to fix) other cars, house, kids, etc.
I think having one that isn't a bastard to you all the time is your reward for all the work you put into the white one. It certainly seems well deserved. One of these days I'm going to attempt a front valance repair like you did - if there's any front valance left by the time I get round to it.