Ok just wanted to post on here my Z550 setup for anyone else who wishes to try something different.
I Changed from a streetpilot 3 with TT mount and found with the TT mount for the Zumo mounted on the crossbar it clashed with the Tank bag I had fitted. Anyway, I have bar risers fitted and took a gamble on the TT GS 1200 bracket this one http://www.touratech.com/shops/008/product_info.php?products_id=9252&session=true and it fits Ok. The Adler mount had to be packed out a little with a split copper ring but it grips lovely on the crossbar now and the tank bag is back in use. Only drawback is it restricts the view of the Left hand indicator flasher, so must double check when de selecting the indicators at times.
I Changed from a streetpilot 3 with TT mount and found with the TT mount for the Zumo mounted on the crossbar it clashed with the Tank bag I had fitted. Anyway, I have bar risers fitted and took a gamble on the TT GS 1200 bracket this one http://www.touratech.com/shops/008/product_info.php?products_id=9252&session=true and it fits Ok. The Adler mount had to be packed out a little with a split copper ring but it grips lovely on the crossbar now and the tank bag is back in use. Only drawback is it restricts the view of the Left hand indicator flasher, so must double check when de selecting the indicators at times.