I suggest 0.05 ultra fine
print lying on its side with full supports
Very minimal cleanup required to make it fit my 597
For the plunger, I am measuring .120 diameter for the wide part, and for the tiny stem on the bottom that rests inside the spring a diameter of .062". The entire plunger is .401" long, with the wide part that holds up the extractor being .301" long and the little stem that rests inside the spring being .100" long.
The author marked this model as their own original creation.