I got some hot shoe mounts because I hate having the receivers connected to the flash connected to the light stand. The hotshoe mounts don't really connect into my 540EZ's very well. You have to jam those fuckers in. Not sure whats up with that. So i try it on my 580 EX II, the hot shoe mount goes on fine and then fires every time with my Cactus trigger. Shit is so weird.