Starlionblue From Greenland, joined Feb 2004, 16351 posts, RR: 66 Reply 2, posted (2 months 1 week 3 days 13 hours ago) and read 2050 times:
The front edge looks like a reinforcement of some sort. That's where you get most wear and tear. Might well be a stronger material and might well be replaced much more often than the rest of the winglet.
"There are no stupid questions, but there are a lot of inquisitive idiots." - from Citadel by John Ringo