I looked for some ideas here on the forum and wanted to add what I did to these nice shells that both had clean breakson both shells.
I have a hand jewelers drill and as you can see you can come pretty close with the hole on both sides
I used a same size drill bit for its pin I used the JB super glue to mate them together
I ordered the Lionel nose protectors and their ready to run.. you can still see the break but I hoping they wont all apart
time will tell.....daniel