its easy to change centre line set up over to new bar- unscrew triangle shaped shackle pull out of webbing,take shackle off,unscrew red ball and pull off then pull small piece of plastic form underneath ball off slide off trim line adjusters and slide whole set out through bar -when putting back on new bar put a little bit of grease/oil on end of black plastic trim line so small bit of plastic from underneath red ball goes back on easy.Takes about 10 mins