I've been using two strips of Velcro one-wrap for the past 2 years. Not very clever, but it works. One for the front fork to the rear triangle, the other for the handlebars (taken off the stem) to the rack. I also wrap my velcro ankle-straps around the stem to keep it from flopping around. The main disadvantage is that I often get my knuckles dirty putting on / taking off the one on the rear triangle.