Well, I've been a bad boy... :oops:
I managed to get the nozzles replaced in my 1.9 this weekend, but was in a hurry, so I wasn't able to take pictures...
They are very similar to the 1.6's, save that the injector housing is longer, and as mentioned there are two concentric springs instead of just one. My spacer and shims showed some discolouration, but none of the grooving on Vince's, so I cleaned everything up and put my new nozzles in without lapping.
Unfortunately, I don't have access to a pop tester at the moment, so I'll have to make due without balancing them for now.
Interesting, I assume that someone has replaced the nozzles at some point in the past, as my understanding is that the stock nozzles are ".278's". That is what smog supplied to me, and what I installed, but .308's are what came out. Right now with the new .278's, it idles Higher (1000 now vs 850 before) and seems a bit more powerful, but that might just be the placebo effect.
My real test will be to see the fuel consumption on the next few tankfuls...