Jerz,

Go to the SIFOW site at http://www.sifow.com/ and in the "SIFOW SCHOOL"
section, check out Lesson 2: "Wing Tips".

Then spend the money on a trip to Ely and Parowan and a lot of tows,
dude!

Anyway, winglets are so late - 20th century...

Kirk
No, I do not have winglet envy, much...