Don't bother. Not really that useful and it makes the camera really heavy and difficult to manage (due to the bulk, dimensions and bits sticking out). Have a press-T btw (which allows you to still have your grip mounted although it will block off the shutter button on the grip, which is kinda counter-productive).
Oh, and you will need to buy quite a few different, rather important accessories such as an anti-twist camera mounting plate (no, you can't use the arca-swiss ones) and anti-twist quick-release flash holder. Those aren't cheap either, which makes the stroboframe one expensive piece of metal... On the upside it's extremely solid and well-machined.
Thanks. Guess I will sell my hotshoe cable.
