Stage 3 – is that the one that started where they used to have a wooden hut ? Just before the old Ewok village ? (sorry – most locals navigate GT by reference to former landmarks).
If that is where you mean, follow along beside the wall, exit to fireroad, immediate entrance to er Black Dog is it ? Where there used to be some cornerly wooden steps. Follow that to the next fireroad, then along about 20 metres and dive left – that is your “unwaymarked” section, but I haven’t been up that way for months and it may have been comprehensively closed. Please don’t ride it if it has, you don’t help the case for events to be run on these trails by ignoring the closures.