Vacaman,

great tip I will surely check mine!! I have a hole drilled in mine and install a Hairclip for safety. I lost a wing on my 40size reactor from the wing bolts vibrating out and after that little experience I started using a hair pin in the dowel pin on all my planes. The little reactor did survive the ordeal, I knifedged it down and although I broke one elevator on the landing and damaged the wing a little the plane was easily fixed and flying again the next weekend.