Those hardwood missiles would be a piece o'cake. I would leave some material inside (he stated he milled it out some), and just drill two counterbored holes. The holes should pass thorugh the missle, into the support rail, and into the wing. If they are tip missles, I just place two 4-40 Du-Bro threaded inserts in the wing tip. If the wing tip is hardwood reinforced already, just tap the holes. The missle rail is jsut sandwiched in so it doesnt really need any internal material to guide the mounting bolts.

Ideally, you want the missle retaining bolts to be as loose installed as possible without the missles reaping apart in flight (they don't need a lot of torque!). This is in case you have a hard landing....so that the missle assembly breaks loose vs tearing out your wing tip. I make my missle rails out of balsa blocks, so they break off easily before damaging the wing. I cover the bottom with .006 Aluminum sheet, to protect from runway scrapes.