The cache would be perfect for my laptop needs but why not make it to take advantage of the annex clips in the bags. All it would need is two little strips of webbing material sewn on. Then the cache would be held in place inside the bag the same way a brain cell is.
This addition would still allow the cache to be x-rayed for TSA purposes and would be as convenient as the brain cell for in and out of the main bag.
Just an idea?