Looks really good. The width of the straps is the limiting factor if you are lean on muscle in the contact areas.
A couple of my vintage packs have welt padding crudely sewn in a very similar way to yours.
If you did the same trick to the waist belt it wouldn’t hurt too.
I still have the one I bought in the '60s. My first back pack. I taught me what a real back ache felt like. That's probably why it still looks little used. I moved on to a better one which I hiked through Europe with. That was a few packs ago.
Nostalgia is nice, but a great back pack it ain't.




























