Woodscra, again, not sure this is the best way but I mounted a 1/8" thick honeycomb/carbon fiber composite plate (1/8" light ply would have been fine) on top of the wing tube. I screwed it to the bottom of the motor box with #2 screws and extended it over the wing tube. I then brilled holes and zip tied it to the wing tube. Tank is held to the plate with velcro. Will try to post pics if I get a chance. cbk