Quick way to hold wing tip weight on. LL~ LL~Actually as strange as it may sound, we trim our pylon racers with quarters, held on by clear tape. This at 195 mph! Quarters happen to be the same approximate weight as the stickers you use to designate which lane you are flying in. SO a quarter balances the plane when you change lane stickers. At least that way, after a mid air collision, you know the scrap balsa is at least worth 25 cents!