I have owned three different Pitts S1's. One , the factory version, had a canopy with these exact lines as guides. These taped lines are OK but just about useless for competition IMO. One practice day with my last S1S and a real site gauge the instructor asked for a series of hammerheads. As each one was performed my instructor told me how many degrees I was off from vertical. When I did get the site gauge to show perfect, the instructor said "hold it". It's amazing how the judges can pick up that small amount of error(1 degree) from my altitude of 2000 ft and they are on the ground. I don't see how the canopy lines can show the same perspective, but they are cheap, a good first step. as an example the 45 up line and inverted 45 down line won't show the same on the canopy, hanging from the belts. Or the reverse cuban, 45 up, roll, push (smooth)(maybe -2G) to hold 45 inverted.
How do you see that on canopy lines? If someone did score well, it was not from lines on the canopy but skill of the pilot.
John