For the past three years, my left wingtip has been resting, open side down, on a pair of airline seats. (Yes, I know the manual recommends hanging them on a wall from their trailing edges... but sometimes I'm an idiot.) After clecoing it onto the left wing, I noticed that it has developed a subtle curve to the opening of the wingtip, and this makes a decidedly-ugly concave bow-in when you sight across the wingtip. It just doesn't match the curve of the adjacent wing. I spent quite a bit of time with a heat-gun and various types of clamps, trying to coax the wingtip into its proper shape, but whatever I did would only hold for a few minutes before the tip reverted to its former, misshapen appearance. After considering my options (including using filler on the concave area), I finally just bit the bullet and ordered a new left wingtip. It should arrive in a few days. No messing around here. I want to get this wingtip done in the next week or two.