It's stronger than you think, I use it for buckles and clasps all the time. I'll be testing my packs out more over the next year to see how the buckles hold upIt simply is beautiful!!
High level craftsmenship and very pleasing to the eye!
I just hope the antler will hold. No idea about its strength.
I made a wooden fold out chair frame for this pack: https://bushcraftuk.com/community/index.php?threads/leather-rucksack.147019/I don't know, it's kind of ugly. I think you send it me while you make something truly beautiful...
In seriousness, it is truly a beautiful ruck! Have you though about maybe adding a small wooden frame?