I am setting up a new Volpe for light credit card touring. I really like the Carradice bags and am looking at getting a Nelson Longflap. My question is about using a support system such as the Bagman or SQR Uplift system. What are the pros and cons of each? The Bagman looks like it keeps the load a little lower and the SQR looks like it rides up higher on the saddle. The Bagman now has a quick release version which is appealling. If the Bagman is the way to go would you go with the Sport (smaller) or Expedition (larger) with the Nelson? Thanks for any and all input.