That's not the fuji blimp, that's one that's baked into the track I think.
The '65 Nords I was using was the __EASY__ update of Rainmaker's track, which has very long grass, borked Esso signs and is 600m up in the air.
Upload your whole track with the changes you did and I'll take a look.
Just to say it being at 600m elevation is technically correct - the lowest part of the RL track is just over 330m above sea level and the highest is around 620m.