Ream the Holes
Now you need to ream out the holes for the body posts so the body can be attached.
If you are using a ream that has hole sizes marked on the side, measure the post size before reaming so you know where you have to stop. For example, if your post measures 5mm in diameter, then you stop reaming when the 5mm line reaches the body.
If you don’t have marks on your ream, make a hole that is slightly smaller than the size of the body post. Place the body on one of the posts so you can get an idea of how much more you have to go. Remove a small amount, then try it again and repeat until the body slides over the post. Once you have one post hole perfect, place the ream in the hole and mark a line on the edge of the ream along the edge of the Lexan. Then you can quickly ream the rest of the holes using that line as your stopping point.