My plan was also to go through the tunnel to #9 then left but I didn't see the uncrossable fence (symbols were too small) going to the right. Once that happened you were pretty much committed to going right. But if you went left yeah that is too much extra distance.
In a way that is good you had some route choice errors. Those are easy to fix compared to execution. Need lots of practice though.
Did Igor map York. If so it would be cool to see if can be used for training.
I planned ahead of time to go left, and even though I was surprised to see that fence stretch so far (didn't see it either), I didn't think of re-routing, and just tried to recover and stick with my original route choice. Anyways, lost of practice for sure.
I think Igor is pretty busy with other maps right now, but it would definitely be a nice sprint area.