Thanks for the offer, John. I would like to get Dave, the new trail steward, involved in this, so hopefully he chimes in here. Matt from the city has asked that we run any changes by him and the golf course; I don't see that being anything other than a formality in this case since it has no bearing on them. Whether they are good with seeing your drawing or want to physically get out there, we'll have to see. Once we've done that, I don't see any reason not to go for it, and try to recruit some help.
One question to think about: It would be nice to eliminate as much two-way trail as possible, so do we want to come up with a plan for that before we start building sections? Ideally, yes, and if you are interested in working on that you would get some support. The risk to building this section without that plan is that this may end up not being used in the end, but if you are okay with that I don't think anyone will stop you from digging.