1897 Project No. 1

[ssgross]

Thanks for looking that up wjw! I need to find me a copy of that.
According to my chart...
https://www.thomasnet.com/articles/c...and-diameters/
that puts us right in the middle of the max/min major diameter of a seemingly non-standard #5-48...which can be had on fleabay. We'll be testing on an aluminum block first of course.
No reason now I can't go ahead and proceed with bluing while I wait.