Tried Knapman's challenge, took an hour to do it in 2 parts. First part was until your blue dot on the picture on a random attempt that went incredibly well for some odd reason. Used a packer to get on the rail with little speed to do the 2nd part (starting after the triangle part but before the major turn left to the uphill). The 'uphill' isn't a problem and neither is the downhill afterwards if you're facing the water. But the sheer amount of stucks and the difficulty of the hardest part makes me say this is never going to happen.