[Ryu James]

i have 3 tekno setups and i was brand new to RC when i had my first two. i flipped the shi* out of my cars, i mean i am talking stuff to put XXX Main videos to shame and i have never had one come loose even. you must not be cinching the straps down tight enough. and if that is the case, velcro on the bottom of the pack wont help anyway. that kind of force from a nose dive will still throw it out if it isnt buckled down super tight with the 3 tekno straps. try it again and see what happens. but this time make sure they are damn tight.

also, does your pack fit inside the tray? or do you have a pack that is longer than the tray? if this is the case i would recommend you shave down one end of the tray so your pack will sit flush with the tray. if you have your pack sitting on top of the end wall because it is too long then this could be the cause also.