I'm using a actionproducts back mounted vest. I found the dsd to heavy and bulky. I personaly would never go back to using a fm vest ever again. All in all I feel less tired at the end of a hard days work and also some how I have the impresion that I can operate more freely than with a fm vest. Ok, running is somewhat harder, but on the other hand i found running with a fully loaded rig murderous anyhow and try to do everything off a hard mount when realy fast moves are required.
David "back mounted forever"