Step 5: Prepare the Base for the Pin
First you'll need to use your handy bit sizer to determine the diameter of your chosen pin.
Once you have this info you can drill the appropriate sized hole in the base.
I was lucky in that there was already a hole in my base that I could use as a pilot hole. If you aren't as fortunate mark where you want your hole to be and then use a metal punch and a ballpeen hammer to make a dent. This will keep your drill bit from walking.
Once you've drilled the first hole repeat this procedure on the side of your base opposite the hole. I didn't. I just tried to use the first hole as a guide. I didn't bother to use my punch to keep the bit from walking. I ended up with a usable, but ugly result. See picture three.
Now use your Dremel with a grinding stone to clean up your freshly drilled holes.