VGO's Amsteel Adjustable Bridge is an excellant option for replacing your existing bridge on any saddle.  Essentially this was to built to improve upon the current stock bridge on the Tethrd Saddle's where the bridge could not be positioned and held where the saddlehunter wanted it.  This bridge is easily installed by girth hitching your main bridge rope to one bridge loop and the continuous loop (which will form the prusik) provided will also be installed via girth hitching to the other bridge loop.  You will then wrap the continuous loop a