Category request for "Germany, Ortsfamilienbuch"??

Question

Hello,

I would like to create a new category to collect all free space pages that exist to describe a German "Ortsfamilienbuch".

I would like to assign the following free-space pages to this new category:

https://www.wikitree.com/genealogy/OFB

I suggest the category be called "Germany, OFBs".

I would like this new category to be a sub-category of "Germany, Sources" which is a category managed by the Sourcerers project - so hereby asking their permission.

Note, I have currently assigned to OFBs to the Germany, Sources category, i.e.

https://www.wikitree.com/wiki/Space:Familienbuch%20Kell%201550-1875

https://www.wikitree.com/wiki/Space:Familienbuch%20Wassenach

so when adding more the sources categories might soon become a little overcrowded?!