I was thinking that a thread which has tips and tricks of machining would be advantageous to everyone, novice to master. The poster would put up pictures, and full description. But we don't need others replying, this way we don't have to scroll to the next tip. Just a reaction is fine. And if someone else has another version of that same tip or trick, put it up. Any topic, something that someone would say, "ahaa, why didn't I think of that." Make it a sticky so we see tips everyday. In that vain, here is mine: parallel seperator. One set is rifle magazine springs. The other is a rubber O-ring, for thinner parts using just one parallel.