yeah, the use of bungies is appropriate in limited apps,
but its' sophmoric to pledge unwavering allegiance to their dubious solidity and strength.
if you don't want to come to one day with an important piece of gear 60 kilometers behind you, id ditch the bungie idea in favor of a more secure lashing system.
.......suggesting cambuckles of many varieties, coupled to a stout nylon strap......