Hmm, no pictures, but let's see if I can describe it better.

THe wing is made up of a few parts in a typical trainer.

The spars are the beams, run the length of the wing, about 1/4 back from the leading edge and parallel to it.

Ribs run perpendicular to the spars and leading edge. They make the airfoil shape.

The tip is the piece attached to the last rib, to give the end of the wing a pleasing shape. It's often solid balsa. If you hold your arms out like wings, the tip is your fingertips. Drill in there, parallel to the leading edge, and insert the weights. Epoxy will work fine, but I find CA is neater to use, if you're careful.

OK here's my mustang. The wingtip is the red part at the end of the wing. I'd drill horizontally into that block, from the end of the wing.

Hope that helps...


J