After watching a few videos and noticing the ST-E3-RT pop up quite often I decided it would be great to have one, changing the power of individual flashes all from the camera would be crazy useful. But they're £300... So I noticed that Yongnuo do a similar thing, YONGNUO YN-E3-RT Wireless Speedlight Transmitter: Amazon.co.uk: Camera & Photo but I can't figure out what flashguns they are compatible with. From what I can make out it seems like they are compatible with the 560iii. YONGNUO OEM YN-560 III (Zoom Function) Wireless Flash Speedlite Flashgun with LCD Screen For Canon EOS 5D, 5D Mark II, 1Ds Mark (IV / III / II / I), 1D Mark (III / II N/ II / I),7D, 60D, 50D, 40D, 30D, 600D, 550D, 500D, 450D, 400D, 350D, 300D, 1100D, 1000D DSLR TTL Flash Speedlite For Canon SLR, Nikon SLR, Olympus SLR , Pentax SLR, Sigma SLR Cameras (GN58): Amazon.co.uk: Computers & Accessories Can anybody confirm? I currently have a Canon 430exii and two YN560ii's. But I use a trigger on the 430 which will in turn trigger the Yongnuos, changing the settings requires me faffing around a bit.