I also have the D600 and have yet to get the Avenger stand (that particular Avenger number comes up alot in discussions of booms when I was doing my research last year).

So far I have hung an Alien Bee 800 off it with barndoors and a Whitelighting X1600 also with barn doors off it. On my not to good lightstand it was OK, but there is nothing like a "real" stand under it. Thank goodness Father's Day is coming.......

Bob E.