I have a few set up
532 + SR5 and CM9
532 + SR2 and SR2 (on low output) and CM9
532 + SR5 and SR2
512 + SR2 and SR2
512 + SR2 and prism 200mw
All seam to work ok, but the 5.8 links are taking a bit to get sorted 100%
Back when the SR2 first came out I tried 4 and a CM9 and killed it. I have learnt from my mistake.
Like everyone says 2 Max