I drilled a hole under the one i'm building now. Even if you don't there are ways to get it out if you really needed too. Like, drill the hole a little deeper in the pin, there should already be an indentation there and tap it with an appropriate sized tap. Screw in a little bolt and get yourself some kind of slide hammer setup and it should come out. Alot easier than removing the block from the receiver and having to refinish. Also, if the tapped hole will bother you, flip the pin over, no one will know different.