For those of you who are using flashes with your Mamiyas, what kind of brackets are you using?
I got more than one flash I could use including a 285hv, but the whole side mounted hotshoe is rather awkward and shopping for brackets has been harder than I thought it'd be.
I wouldn't use the side hotshoe to mount a flash, because it would put too much strain on the side of the camera. It (the hotshoe) would be useful with something like the removable sensor for Vivitar 283s.
When I use a shoe mount flash (Vivitar 4900 or Olympus T32 or T20) I use the Mamiya GL401 left side grip with the appropriate terminal adapter. It has both an additional electronic shutter release and a hot shoe for flash.
If you decide on the GL401, be careful that you get the right terminal adapter for your camera, because the 645 Pro takes a different one than the Super requires - they are different shapes.
I'll also use my Super with a Metz 60 series flash, using the basic Metz bracket.
A bracket like this might also work - I haven't tried this, but it does permit placing the flash directly above the lens:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=110387940314&ssPageName=STRK:MEWAX:IT
Matt