Del yeah thats the bit.I love the line, so I would just try and reinforce it and improve drainage. The drop at the fireroad brake could be rebuilt to as it has lost some height.
Its a shame that the big sweepy steep corners are eroding so quickly. Not sure how they could be reinformace/protected.
Could you also drop me an email as I’m sure I can help with some ad-hoc trail work now and then! Email in profile.