comments:
Instead of the bungie, I went with this Hikeman kangaroo pouch on my CZ Classic 28. I attached the top clips to the handle on my bag and the bottom clips to the bottom compression straps on the bag. With your bigger bag, you might be able to just use the compression straps to mount all the clips. The buckle clips make it easy to remove the pouch to get in the zippered lid pocket. I mostly use the pouch to stuff my coat into, but it would hold a pair of shoes. https://a.aliexpress.com/_msIob0f The CZ Classic 28 doesn't have a bottle pocket so I use the lid zippered pocket to hold a flat 500ml flat water bottle. https://www.amazon.com/dp/B0CJ4963YJ The bottle also fits in the straps on this bag that make it into a hip/bumbag. I carry the bag at the destination as my man purse. https://a.aliexpress.com/_m0AkNJ5 When in the security line at the airport, I shorten the strap on the bag so that I can hang the bag on my neck. I can then strip off my watch, and empty my pockets of phone, passport, reading glasses, and small towel, into the bag. I dump the purse in the kangeroo pouch along with my jacket. Once though security, I hang the bag on my neck again, with my pack on my back I can put everything back as I am walking to the concourse.