Hi, I was looking for a flash that has High Speed Sync (HSS) capability and can be used as a Master in TTL (for instance be mounted on the hot shoe of Panasonic GH3) with my Yongnuo 560 III in slave mode. So far I have found the Cactus RF60 which seems to be having Master mode with TTL, High Speed Sync capability. (here is the link to Cactus: http://www.bhphotovideo.com/c/product/1071311-REG/cactus_dicflacacrf60_rf60_wireless_flash.html) The Yongnuo 560 III has a radio receiver and the Cactus RF60 Wireless flash, but I don't know if this feature is enough for them to communicate. I am wondering if anyone has experience with these flashes or experience with flashes to advise me on the following: Yongnuo 560 III is obviously a manual only flash and can not be used a s a master. But what I am wondering about is if I can use the Cactus RF60 as Master (when shooting with my Panasonic GH3), and have it command the Yongnuo 560 III in the slave mode?