I know that there must be a way but for the life of me, I can't figure it out. Is there anyone using non-sony flashes in the hot shoe of the RX1 using some sort of "hot shoe adapter" that translates the RX1 contacts into a universal "any flash will do" set of contacts? There are multiple options that I've seen and it's not clear which one does what. On a related note; which is the cheapest sony flash that is compatible with the RX1 wireless flash system? And does it work with the flash off of the hotshoe?