lock for locker -OpenScad

lockers in crew changing room are fitted with nice looking small lock with keys, but often happens that keys are missing, locks destroyed and what ... leave empty hole?
Here is my try to solve problem. It is customizable, but use OpenScad to modify- I'm not sure Customizer will work.
This version is fitted with knob. Later I will try to make cylinder with simple rod key or slide blade key with combinations based on excellent John Gardner Slide Blade Key Generator (see www.thingiverse.com/belfry/designs/

Enjoy

libraries used - threadlib.scad by Adrian Schlatter
regular_shapes.scad by Giles Bathgate, Elmo Mäntynen

Assembling
Cylinder with square rod put into outer cylinder and secure with half washer. It should turn easily inside outer cylinder. Fix it to the doors with securing half washer pointing upward. Use small file and make threads in securing washer to fit threads in outer cylinder. Put big washer on it and secure with nut.Then slide leading cylinder w