RE: 150 meter rule.
In the NATS in Norway we put the poles in the 150 meter line and most of the 30 pilots did not have any problems to follow that line. Its about get used to the distance and make the size of the maneuvers in accordance to the limitation of the sector. But it could also be that the European style of flying (slower and smaller maneuvers) gives an advantage in accordance to the 150 meters rule.
Since Im a beginner in the Nordic classes (similar to Advance) i have no experience from flying far more out with big maneuvers.