Tools! Ya gotta love them. Special tools? Only when ya need them. Blind holes and thru holes....Are we having fun yet? Never be afraid to ask the question. There are special taps for very specific tasks. Ever take a micrometer apart? Lots of thread pitch issues come up with old stuff from the "Pre-standard" years. Try to get a good answer to the ream verses hone question some time. And yes old gun parts are fun too.
