Hello all, I may just have been lucky on eBay today, I won an auction for a FS-FC1 flash controller. Now, I don't own a ringflash unit, and the auction was for just the controller. I want to try to build the strobe heads myself. Does anybody know the pinout of the ringflash and twinflash units? Apparently the units have six pinned connectors. I have done some thinking and I think one pin is earth, one is positive, one trigger. There are some modelling lights in these units so that's probably one extra pin as well. I think the other two pins are to let the camera know if the flashunit connected is a ringflash or one of the twinflash units. Am I on the right track here? Does anybody have servicemanuals/ schematics for these units? Best regards, Jarno.