ProEdgeBiker: Carter's finger has a beautifully designed/built boardwalk TTF on an advanced trail - designed to be ridden in two directions. It has no sharp angled direction changes - unlike North Creek's advanced TTF, with a 30 degree top transition and steep drop into another 30 degree bottom transition onto the trail.
So far, my thinking is to "round off" the top transition and coat the surface using waterproof concrete paint with sand and a color to match the surrounding dirt/clay. Perhaps the intermediate rider will then commit without thinking, ride down the ramp and congratulate themselves.