RE: H9-F6F Hellcat 60 ARF
Flight Hawk. I have used these weights for a long time and never have any come off. I drill a 3/32 hole in the center of the weights ( I have used a strip of up to 4) and a 1/16 hole in the plane(CA this hole). After I stick it on the weights, I secure them with a servo screw. If your not sure about the exact weight don't stick them just use a screw or two. No way there coming off!![>:]