I have not used nitrous since I switched from stock stroke to stroker motors (so, since 2008). I have considered it....but when I built the current motor I did not gap my rings for nitrous use (since I'm already pushing the limits of my rods and block). My cheater setup now sits on a shelf collecting dust, because I don't trust my self having it installed on the car....the temptation to get that one 9 second time slip would be too much for me to handle, lol.
Edit: To answer your question directly, no, I have not used it on this combo. I built this engine about 3 years ago.