Step 2: Salvaging pen parts
Step 3: Get the black tip ready.
First, take your drill and 5/32 general purpose bit and enlargen the tip of the black tip by drilling in through the back, like the main pic. Second, you have to file(dremel is easier) down the little edges that stick out around the middle that would keep the tip from going into the pen tubeand file those down, alond with the area that actuall should go into the tube, so that the black tip can be pushed in completely into the tube. Note: Make sure you file or dremel it down enough so it can be pushed in but it should be big enough to keep itself in, in other words, dont let it slide out. you also dont want it to be hard hard to get in. Test for this often while filing or dremeling. The final thing should look like the second picture.