I have plans to build a Spider XVP, and care to ask what is the most versatile length front fork for the frame -80mm, 100mm or 120mm? I have heard from a reliable source that 80mm is the length around which the frame is designed, and 100mm is the max length that still takes advantage of the frame's abilities. From the previous and current Spider XVP riders, what is your opinion? The intended use of the frame is for XC -fireroads primarily, and maybe the occasional singletrack here n' there. Thanks.