Question about flashes
I have a couple of 285HV's. They work fine as slave flashes using PC cord and a dirt cheap eBay adapter for the Sony hot shoe. I've used them on my KM 5D and tested if they fire as they should on my A37, and no problems in that configuration.
I haven't tried slave triggering them although I have some old slave shoes for them. I can try that later during the week if I have time, a very busy week ahead of me so I can't promise anything.