This giant lock is meant as a visual aid in teaching lock picking or the mechanics of the lock. I have printed one and donated it to Unallocated Space so they can teach with it. It has been very helpful for them so I hope it can help you too.
The lock is designed with minor 0.25-0.5mm variances in the pin cuts in the cylinder. This unfortunately doesn't translate well to the scale of the lock. None the less the variances are there.
I originally developed this lock July 2017 and my plan was to have it tested by my local TOOOL and make a version 2 for release. A year later and I still have not found the time to make the revisions but the local TOOOL chapter really enjoys the lock as is. I intend to make a version 2 one day to improve lots of little nitpicks but in all, this lock works. A few printing pictures from 2017 are here: https://imgur.com/a/aUoJW
Supports - Touching the Build Plate.
Infill - any but low values should be fine.
Resolution - High resolution for smoother turning.
Orientation - Print it as is. I attempted other orientations, even upside down but the best orientation is laying on the bed as is.
Notes - I left the support material on my lock because I liked how it let the lock be stood up on the table.
Supports - Touching the build plate.
Infill - should be low 5-10%.
Orientation - same again. Though this piece can handle other orientations if you use the right supports.
Resolutions - High resolution for smoother turning.
Supports - Everywhere.
Notes - High shells recommended.
Notes - High shells and infill recommended
Orientation - I printed mine as is but the layer lines combined with a strong spring ended up creating a very difficult lock to pick. If I were to print this again, I would try laying the pins on their sides with supports to make the layer lines perpendicular to the cylinder. Option two is print the pins at very high resolution.
Remove the support material. Depending on how well your Z is calibrated will dictate how much sanding you have to do. Expect to sand the cylinder and plug. You want the plug to turn smoothly.
Find some springs. This is for demo purposes and it could work somewhat without springs. You want the lightest springs possible and I have yet to find the perfect spring. Leave a comment if you find one.
You can choose to have all your driver pins the same size or you could have them complimentary. A 9 pin could go with a 1 Pin, A 4 pin could go with a 6 pin. etc.
TinkerCad! Lots of TinkerCad.