I have had a very successful time doing this, the key for me is to do all at 1 time. My 300 had 4 pairs, all juveniles when added, and all added at the same time, they would switch partners often as they grew up, it was pretty cool to watch.
My 2 x 80 gallon frag tank had 15 pairs of juveniles in each, they were all fine, I sold them off in pairs, but never had any issues. Now, I bought them to sell, but they were paired up for 10+ months with zero issues. I didn't want to sell them before then, I loved watching them in the frag system.
Again, every single one of them was introduced at the same time, I don't suggest adding a pair to an established tank with an adult pair already, but if you can put all 4 in at once, you should be successful.
I will try to dig up some pics.