Maybe FLAPhappy thinks lag bolts will hold in FOAM ! On using rubber bands he says "they break" (not if you only use new ones),"they come loose" (not if you are smart enough to install them correctly), "with glow fuel" (the OPs plane is electric),"they rot" (again, not if you use new ones), "and there goes your wing" (got to use the correct number for the plane's weight) and "bla, bla, bla". Yes, a bolt on wing is an improvement on many planes but not in all cases. IE; the OPs electric foamy trainer, and also the plane I flew today, a classic 1955 Debolt Live wire Champ powered by a .25 glo engine. New bands, the correct number, properly installed,= nice enjoyable flights and NO wing loss or movement. You just gotta know what you're doing. flymetothemoon, Ignore FLAP's advice as it doesn't apply to your Apprentice.