I sharpened a drill bit before drilling and it went right through the shell with ease.
Then I filled in the second shell and attached it to the blade.
Once that had set up, I drilled through the second shell by going through the first set of holes I drilled. I also enlarged the hole by a few thousands so the pins don’t crack later from stress.
Now I’ll glue these up and finish shaping the scales and sand the top and outside edges to finish this one-off.