Don’t over think this. A tuffpak is about the easiest thing you can buy for taking rifles on planes.
One lock, not 4. Tough as hack. Room for clothes and boots. Has wheels and is secure.
I have used the following -
Cabelas aircraft aluminum case with the long rod to lock.
Americraft case - aluminum and easily dented and ruined
Pelican 1750 - very good case, awkward, bulky and heavy, obvious gun case
Tuffpak - toough, wheels, carry three guns or 2 with soft case. No brainer
So, decide what you want, then buy a tuff pak….