Wing Tip Modifications
Next is the profile from above/ below, and this is where the inaccuracy really shows. This is a scale drawing of the upper left wing tip. Print it out (see printing directions below) and lay it over your plans, and see how far off it is. Especially noticeable is the lack of rounding on the leading edge.
This is why you need to add the balsa behind the leading edge near T-7, as stated in the previous post.