The Reggie Forward-Adjust Backband that comes with all of the parts necessary to replace your current forward adjust backband system. Forward adjust means that the backband adjustment mechanism is on the thigh brace as seen on most modern whitewater boats.
It is NOT recommended to use this in boats that were not originally designed as forward-adjust. In many cases, the thigh braces in these boats were not designed to withstand the pressure applied to a backband. For a crafty tinkerer however this combined with ratchets sold separately is probably your best bet as a starting point for fabricating your own retrofit of a legacy boat.