How many hours of project work and revision did he put in?- I can tell you - none.
I imagine the theory can stand a great deal of revision.
"What was once considered sufficient may now be in need of further revision."
But these changes were made after the second stage of revision had been completed.
The fourth and final period of revision ended in 1861.
But once it gets old enough to be in danger of revision, many more students suddenly say no thanks.
After a number of revisions, the work was used as a basis for reform starting in 967.
After specific rules have been written, they will be subject to the normal process of comment and revision.
By doing so you will begin that vital process of critical analysis and revision at an early stage.
The "council of revision" would have included the President along with some federal judges.