What were you planning on doing with the left over hole? I plan on doing the same thing..
If it doesn't look too bad to me in person, I'll probably just leave it. If it does, then maybe fill it with some bondo or something like that.
when mine comes in I am going to fill it with some UV curing epoxy resin (surf board ding repair) let it cure, sand it smooth and paint it black, shouldn't take more than 10 minutes including cure time. I'm on the east coast in Florida so ding repair is readily available, however you can find it on Amazon too.
I also used it to fix dings, imperfections and chips on the shell when I did my pack build worked great!