So I purchased the GW-4 wide-angle adapter for my GRIII. Optically it's stellar, I think i'll have a lot of fun with it.
One thing - it made the camera quite front heavy. I stumbled upon these on ebay, was wondering if anyone tried these? Looks like it should balance out the lens, provide better grip, and also would allow the camera to sit straight on the table due to that added height.
I realize it will diminish some of the awesome compactness of the GR, but I think it should be easy enough to remove it and GW-4 if I need maximum compactness, plus give me an option for better ergonomics with the wide-angle lens.