Been watching a few videos where people have been using the ST-E3-RT with the 600ex flashguns. I like that you can trigger each speedlite, turn them on and off and change the settings of them all from the transmitter.
However, I haven't got the £2,000 I would need to get a transmitter and three or four guns.
I've been looking around and it seems Yongnuo do a cheaper version http://www.amazon.co.uk …&sr=8-1&keywords=yn-e3-rt
but I am unsure as to which flashguns it will work with. I presume the YN560iii?
I have a 430ex ii at the moment and two YN560iis. I would be happy to replace the 560iis with 560iiis if they are able to be controlled in the same way as the ST-E3-RT works.
Does any of that make sense? 
Cheers

