But I made up a rear derailleur protector I posted up on my own facebook page and all of a sudden I have 4 orders for a part I made from scrap parts and a few scraps of carbon. Un-tested and although it fits my bike I really have no idea if it will work with any other model in the same manufacturers range never mind other makes... One of the guys wanting the part is runner up in some world championship and oddly for a world title contender actually wants to pay for the part! The other guy is associated with a Mountain bike shop and wants one to test himself and modify if needed and a second one to see if they can actually drum up sales too... Finally the last one I am making for someone else as a freebie for a mate who rides competitive events and has had some damage to the part I am trying to protect myself.... Looks like I should be going into the mountain bike business.... lol..