Has anybody tried, in real world production (not a lab), configuration of an RB600A with two R52N cards operating MIMO links both in 5GHz?

Something like:

R52N ---> 5.8GHz 802.11N <--- R52N/RB600A/R52N ---> 5.8GHz 802.11N <--- R52N


Basically what I am wondering is if the two 802.11N links would interfere with each other being in the same board/box and not RF isolated from each other?

I didn't say, but meant to imply, one link running ~5.2Ghz and one running ~5.8Ghz to allow maximal separation.