Here's the thread on my build.
190Rev.net - Discussion for Mercedes-Benz 190E W201 Performance, Parts, Tuning and more
Hindsight being 20/20, I used the wrong Saab fuel rail. There is another saab 900 fuel rail with a rectangular profile instead of the round one you see in the pic above. That fuel rail has a built in FPR which makes installation much more simple. My FPR is off an Isuzu. Eventually I'm going to swap out the round fuel rail for the square one. So far I have 50k miles on this setup.
For starters I would just start with the Volvo injectors until you get the car on the road, then upgrade to the EV6 injectors.