greetings, noob here. i'm having trouble triggering the YN560IV with my RF603II (canon model) on my A6000. i've read thru several threads here and on dpreview so here's what i can tell you about my issue and hopefully someone can point out my error. the 603 is paired with the 560 and will fire a test flash via the top button while mounted on camera (rf603 mode, ch1 for both, blue light winks, etc). the 560 will fire when mounted on camera. i've scraped the underside of the hotshoe rails enough to see plenty of bare metal. camera is currently set to fill flash and 560 is set to M , tho i don't know if this matters. i'm assuming that what's supposed to happen is that i push the 'take picture' button on the camera and the flash is supposed to fire according to whatever settings i've entered via it's onboard controls. that's what happens when the 560 is on camera. i've also tried both 603s (shipped as a pair) with the same results. i'm currently sliding my trigger in and out of my shoe like a technopervert but so far no joy. so, if anyone has any insight, that'd be spectacular. thanks.