I was curios what wear I would find on the flag line on my bar, bought 8 months ago, after reading this tread about the faulty line.
I have the same wear and see what the future might bring.. Anyhow, I am in a different opinion of @smccask and the linked thread..
My findings (I know I might be wrong are.
The wear starts approximately where the match is.
The hole which @smccask mentions is inside the cap. There might be issues with his, but mine was very smooth and could not damage the line.
The point where the match is will reach the metal ring when you pull out further the flag line when connectong either leash or suide ring.
Looking that the point where the wear / match was, it is also where the connection between tube and cap is.
Shows how the line enters the tube; it is less than half size of the metal ring, maybe even less. There is surely an interference and resistance between the line and tube
Shows the tube and the edge around the tube "entrance". Even though it is plastic it is relative hard and sharp.
I believe it is here the wear occurs. The flag line is pulled out of the chicken loop when assembling it or connecting to the leash. I often see my line hanging maybe 20-30 cm out the CL when connecting. (I havent found anyway to avoid this - it annoys be a bit (I mean, it annoys so much a hanging line can annoy these days..
). All the 20-30 cm line has to go back into the tube. Either manual by hands or it happens when someone lifts the kite for launch. That means at every launch the line will slide against the "sharp" edges of the tube. Maybe once again when doing a pack down after a session. That's a lot of traffic at the plastic edge for the little red line.. Maybe not an instant issue, but I believe it is a great wear over time!
I have tried to make the edge of the tube less sharp by cutting it with a stanley knife. Doesnt look good, I know, but I think will give the line a smoother entrance into the tube. I might be wrong and have a pending disaster, thou I doubt.
i am not sure how I can make it even softer.
One more thing I have noticed, but not sure about is how the tube and the cab is aligned.
Looking at the cab the hole / metal ring is exactly in the center.
Looking at the tube it is much more side aligned.
I believe this will result in a non-straight flow of the line in the area between the metal ring and the tube. Maybe the line will constantly enter the tube line and the "sharp" edge in a 20-45 degree angel. Making the resistance between line and tube even bigger.
As mentioned, I dont know if this is the actual problem, but for the moment this is my opinions and findings!
What do you reckon?