I have three Cactus V6 IIs and a couple of Olympus FL-600Rs. There has been no word for a number of months as to when microcode to support X-TTL for Olympus, Canon and Nikon will be available. It would be great if some update could be provided. The lack of information makes one wonder whether Cactus has run into problems and will not be able to deliver the new functionality.
PS: great products! I really enjoy the flexibility of the V6 II transceiver.