Hello Garden Maniac, Thanks for the info. I do have a couple of "flash on Hotshoe to pc socket on camera" adapters so I can use my Nissin 360tw flashes on brackets and connect them to various camera's pc sockets, I also have a couple of Nikon AS-10's so I can use my flashes on brackets and still fire the flashes from my Nikon F301 which doesn't have a pc socket, but I want a sync cord to use with the SB20 flash which uses a standard pc socket rather than the "special" pc sockets on my Nissin 360TW flashes, which is why I bought an SC-15. I also wanted to use the TTL capability of the SB20 and F301 combo even when the flash is on a L bracket, but it seems th SC-17 which would allow that doesn't have a coldshoe fitting on the bottom of the hotshoe bit which the F301 slides onto, though it of course has a hotshe bit on the bottom of the camera end.
I'm writing this at 04:19am so if it's not so easy to follow, that's the reason, lo.