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Enjoyed Atlashot's post of his One Way Cylinder. I have intended to make one for demo use at some of the Locksport meetings so I got my files out and went to work.
I have posted photos with a link to my Dropbox to help explain what I did.

I filed down two pin positions so I could have one key work CW and the other work CCW. I also wanted a Master or Owner's key. I used two of the few master pin that I had with me.
The master pins are in position 2 and 4 of the cylinder as seen in the photos. Any pinning could be used in positions 1,3 and 5. I just chose some at random.
The keys are cut as follows....

1 2 3 4 5
Master 6 3 6 5 9
CCW 6 5 6 5 9
CW 6 3 6 3 9

Not real secure but it will do to demo the idea. All standard pins and just the cylinder was changed.
Hope some of you enjoy this....

photos at https://www.dropbox.com/sh/zbh43p3e6v7c ... ZFnqa?dl=0

Steve

Cool stuff Steve, thanks for sharing..

Indeed! It looks like you pulled it off nicely.

No doubt it will spike some interest at the meeting.