you eat a whale one bite at at a time lol.
it all comes down to history the first folks to carve their holsters had ideas but no designs no practice in most cases no real tools just something to do during a slow period of surviving life like winter time lol. They made their holsters and any ornamentation to suit themselves. Its a form of folk art. IF you like it that is what matters most.
I had an art teacher once i thought i was a crappy artist, which i am lol, but he asked me do you know why the Madonna is such a great piece of art? Because no one knows what she looked like. do you know why copies never look as good? because you do know what the painting looks like.
The point here being you can try and copy a design or technique like Sheridan but you wont be satisfied because you know what it is supposed to look like and you just dont have the practice to pull it off but that doesn't mean your own work will be bad, just different and unique. Its time to jump in and have fun with your own style. i cant wait to see it myself!!